CBSE Board Class 10 Science Answer Key 2024 and Question Papers, Download PDF All SETs

The Central Board of Secondary Education (CBSE) conducted the Class 10 Science board exam today, March 2, 2024. The exam was conducted between 10.30 am to 1.30 pm.

Now, as the exam is over, we bring you post-exam review, paper analysis and student feedback on the difficulty level of CBSE Class 10 Science exam 2024. Compare your answers with the CBSE Class 10 Science Question Paper 2024 Solved PDF available on this page.

 👉 CBSE Class 10th Science Question Paper With Answer Key

CBSE Board Class 10 Science Exam Overview

• Date: March 02, 2024
• Time: 10:30 am to 01:30 pm
• Mode: Offline (Pen and paper)
• Duration: 3 hours (additional 15 minutes for reading the question paper)

The CBSE Class 10 Science syllabus covers a total of 13 chapters, categorized into Physics, Chemistry, and Biology. Students can expect both objective and subjective questions in the exam.

CBSE Board Class 10 Science Question Paper Structure

1. Objective Section (Section A):
   • Consists of 20 objective-type questions, each carrying 1 mark.
2. Very Short Questions (Section B):
   • Contains 6 questions, each carrying 2 marks.
3. Overall Total: 39 questions

CBSE Science Analysis: "Balanced paper"

The Class 10 Science paper is a balanced one. Students who have studied their NCERT textbook thoroughly will score well. The pattern was similar to the CBSE sample paper and the difficulty level was not very high.

CBSE Class 10 Science Exam Analysis 2024: Students’ Reactions

The Central Board of Secondary Education (CBSE) Class 10 Science paper 2024, was moderate and well-balanced as reviewed by students. All questions were based on the latest syllabus and followed the pattern of CBSE sample paper.  

CBSE Class 10 Science Paper Analysis 2024: Experts' Review

As per the analysis shared by the subject teachers, the science paper of class 10 board examination was moderately easy to average. No question was found to be outside of the syllabus. About 60-70% of the questions were straight from the textbook.

• MCQs were mostly average and needed conceptual knowledge.
• Case based questions were easy to moderate.

CBSE English Answer Key Class 10 2024

1. Select from the following a decomposition reaction in which source of energy for decomposition is light:

(a) 2FeSO4 →Fe₂O3+ SO₂+ SO3

(b) 2H2O → 2H2 + O2

(c) 2AgBr → 2Ag + Br2.

(d) CaCO3 → CaO + CO2

Ans: (c) 2AgBr → 2Ag + Br2.

2. When 2 mL of sodium hydroxide solution is added to few pieces of granulated zinc in a test tube and then warmed, the reaction that occurs can be written in the form of a balanced chemical equation as :

(a) NaOH + Zn → NaZnO2 + H₂O

(b) 2NaOH + Zn → Na2ZnO2 + H2

(c) 2NaOH + Zn → NaZnO2 + H₂

(d) 2NaOH + Zn → Na2ZnO2 + H2O

Ans: (b) 2NaOH + Zn → Na2ZnO2 + H2

3. MnO2 + HCI → MnCl2 + 2H2O + Cl2

The reaction given above is a redox reaction because in this case:

(a) MnO2 is oxidised and HCI is reduced.

(b) HCI is oxidised.

(c) MnO2 is reduced.

(d) MnO2 is reduced and HCI is oxidised.

Ans: (c) MnO2 is reduced.

4. Consider the following compounds: 

FeSO4 :  CuSO4 : CaSO4 : Na2CO3

The compound having maximum number of water of crystallisation in its crystalline form in one molecule is:

(a) FeSO4

(b) CuSO4

(c) CaSO4

(d) Na2CO3
Ans: (b) CuSO4

5. In a nerve cell, the site where the electrical impulse is converted into a chemical signal is known as:

(a) Axon

(b) Dendrites

(c) Neuromuscular junction

(d) Cell body
Ans: (c) Neuromuscular junction

6. A metal and a non-metal that exists in liquid state at the room temperature are respectively:

(a) Bromine and Mercury

(b) Mercury and lodine

(c) Mercury and Bromine

(d) lodine and Mercury

Ans: (a) Bromine and Mercury

7. At what distance from a convex lens should an object be placed to get an image of the same size as that of the object on a screen?

(a) Beyond twice the focal length of the lens.

(b) At the principal focus of the lens.

(c) At twice the focal length of the lens.

(d) Between the optical centre of the lens and its principal focus.

Ans: (c) At twice the focal length of the lens

8. Carbon compounds:

(i) are good conductors of electricity.

(ii) are bad conductors of electricity.

(iii) have strong forces of attraction between their molecules.

(iv) have weak forces of attraction between their molecules.

The correct statements are:

(a) (i) and (ii)

(b) (ii) and (iii)

(c) (ii) and (iv)

(d) (i) and (ii)

Ans: (c) (ii) and (iv)

9. Oxides of aluminium and zinc are:

(a) acidic

(b) basic

(c) amphoteric

(d) neutral

Ans: (c) amphoteric

10. Chromosomes:

(1) carry hereditary information from parents to the next generation.

(ii) are thread like structures located inside the nucleus of an animal cell.

(iii) always exist in pairs in human reproductive cells.

(iv) are involved in the process of cell division.

The correct statements are:

(a) (i) and (ii)

(b) (iii) and (iv)

(c) (i), (ii) and (iv)

(d) (i) and (iv)

Ans: (d) (i) and (iv)

11. Consider the following statements:

(1) The sex of a child is determined by what it inherits from the mother.

(ii) The sex of a child is determined by what it inherits from the father.

(iii) The probability of having a male child is more than that of a female child.

(iv) The sex of a child is determined at the time of fertilisation when

male and female gametes fuse to form a zygote.

The correct statements are:

(a) (i) and (iii)

(b) (ii) and (iv)

(c) (iii) and (iv)

(d) (i), (iii) and (iv)

Ans: (b) (ii) and (iv)

12. Which one of the following organ is NOT a part of human female reproductive system?

(a) Ovary

(b) Uterus

(c) Vas deferens

(d) Fallopian tube

Ans: (c) Vas deferens

13. In which of the following organisms, multiple fission is a means of asexual reproduction?

(a) Yeast

(b) Leishmania

(c) Paramoecium

(d) Plasmodium

Ans: (d) Plasmodium

14. In bifocal lenses used for the correction of presbyopia :

(a) the upper portion is of convex lens for the near vision and lower part is of concave lens for the distant vision.

(b) the upper portion is of convex lens for the distant vision and lower part is of concave lens for the near vision.

(c) the upper portion is of concave lens is for the near vision and lower part is of convex lens for the distant vision.

(d) the upper portion is of concave lens for the distant vision and lower part is of convex lens for the near vision.

Ans: (d) the upper portion is of concave lens for the distant vision and lower part is of convex lens for the near vision.

15. The pattern of the magnetic field produced inside a current carrying solenoid is:

Ans: (c)

16. Identify the food chain in which the organisms of the second trophic level are missing:

(a) Grass, goat, lion

(b) Zooplankton, Phytoplankton, small fish, large fish

(c) Tiger, grass, snake, frog

(d) Grasshopper, grass, snake, frog, eagle

Ans: (c) Tiger, grass, snake, frog

For Q Nos. 17 to 20, two statements are given - One labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:

(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

(b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

(c) Assertion (A) is true, but Reason (R) is false.

(d) Assertion (A) is false, but Reason (R) is true.

17. Assertion (A): The rainbow is a natural spectrum of sunlight in the sky.

Reason (R): Rainbow is formed in the sky when the sun is overhead and water droplets are also present in air.

Ans: (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

18. Assertion (A): Hydrogen gas is not evolved when zinc reacts with nitric acid.

Reason (R): Nitric acid oxidises the hydrogen gas produced to water and itself gets reduced.
Ans: (a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

19. Assertion (A): Accumulation of harmful chemicals is maximum in the organisms at the highest trophic level of a food chain.

Reason (R): Harmful chemicals are sprayed on the crops to protect them from diseases and pests.
Ans:(a) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).

20. Assertion (A): The rate of breathing in aquatic organisms is much faster than in terrestrial organisms.

Reason (R): The amount of oxygen dissolved in water is very high as compared to the amount of oxygen in air.

Ans: (b) Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).

Section B

21. (B) Name one directional growth movement each in response to chemicals and water in plants. Write an example for each of them.

Ans: Directional Growth Movement in Response to Chemicals:

• Chemotropism: Chemotropism is the directional growth movement of plants in response to chemicals. An example of chemotropism is the growth of pollen tubes towards ovules in the pistil of a flower. In this process, chemicals released by the ovules attract the pollen tubes, guiding them towards the ovules for fertilization.

2. Directional Growth Movement in Response to Water:

Hydrotropism: Hydrotropism is the directional growth movement of plants in response to water. An example of hydrotropism is the growth of plant roots towards a water source in the soil. When roots sense a gradient in water concentration, they grow towards areas with higher moisture levels, ensuring optimal water uptake for the plant's survival and growth.

22. (1) Give reason why herbivorous animals have longer, small intestine than camivorous animals?

Ans: 

(i) Herbivores vs. Carnivores and Small Intestine Length

Herbivores have longer small intestines compared to carnivores because of the difference in their diets and the complexity of digesting plant material. Here's why:

• Plant cell walls: Plants have cell walls made of cellulose, a complex carbohydrate that most animals cannot digest on their own.

• Microbial breakdown: Herbivores rely on microbes (bacteria and protists) living in their gut to break down cellulose. This process takes longer than digesting meat, which carnivores primarily consume.

• Increased surface area: A longer small intestine provides a larger surface area for nutrient absorption. This allows herbivores to extract the maximum nutrients from their plant-based diet, which is generally lower in readily available nutrients compared to meat.

(ii) Although 'Pepsin' and 'Trypsin' are both protein digesting enzymes yet they differ from each other. Justify this statement by giving one difference between them.

Ans: Differences Between Pepsin and Trypsin

Both pepsin and trypsin are protein-digesting enzymes, but they work in different environments:

• Pepsin: This enzyme is secreted in the stomach and functions best in a highly acidic environment. It breaks down proteins into smaller peptides.

• Trypsin: This enzyme is produced by the pancreas and works best in a slightly alkaline environment of the small intestine. It further breaks down peptides from pepsin's action into individual amino acids, which are then absorbed into the bloodstream.

Key Difference:

The main difference lies in their optimal pH range for activity:

• Pepsin: Acidic (stomach)

• Trypsin: Slightly alkaline (small intestine)

This ensures efficient protein digestion throughout the digestive system.

23. Translate the following statement into a balanced chemical equation.

"When barium chloride reacts with aluminium sulphate, aluminium chloride and barium sulphate are formed."

State the type of this reaction giving reason to justify your answer.

Ans: The balanced chemical equation for the statement is:

3 BaCl₂ (aq) + Al₂(SO₄)₃ (aq) → 2 AlCl₃ (aq) + 3 BaSO₄ (s)

Type of Reaction: This is a double displacement reaction.

Here's why:

• In a double displacement reaction, the cations (positive ions) of two ionic compounds swap places to form two new ionic compounds.

• In this case:

  • Barium (Ba²⁺) from barium chloride (BaCl₂) replaces aluminum (Al³⁺) from aluminum sulfate (Al₂(SO₄)₃).

  • Sulfate (SO₄²⁻) from aluminum sulfate replaces chloride (Cl⁻) from barium chloride.

• Both the starting and ending compounds are ionic (contain metals and non-metals as charged ions).

 

24. (1) Two magnetic field lines do not intersect each other. Why?

Ans: (i) Why Magnetic Field Lines Don't Intersect

Two magnetic field lines never intersect because it would violate a fundamental property of magnetic fields: having a unique direction at any point. Here's the explanation:

• Magnetic field lines are a visual representation of the direction and strength of a magnetic field. They depict the path a tiny north pole would take if placed in the field.

• If two field lines intersected, it would imply that at that point, the north pole could experience two different directions simultaneously, which is impossible. A magnetic field can only have one defined direction at any given location.

(ii) How is a uniform magnetic field in a given region represented?

Draw a diagram in support of your answer.

Ans: Representing a Uniform Magnetic Field

A uniform magnetic field in a given region is represented by parallel straight lines with the same spacing between them.

• The arrows on the lines indicate the direction of the magnetic field, typically pointing from the north pole to the south pole of a magnet creating the field.

The uniform spacing between the lines represents a constant strength of the magnetic field throughout the region. A denser packing of lines would indicate a stronger field, while sparser lines would indicate a weaker field.

25. Draw the pattern of the magnetic field lines due to a straight current carrying conductor indicating the direction of current in the conductor and the direction of the corresponding magnetic field lines.

Ans: Magnetic field lines around a current-carrying conductor:

1. The direction of magnetic field lines will be shown using the right-hand thumb rule. The magnetic field lines will be directed by the fingers wrapped around the current-carrying conductor if the conductor is held in the right hand with the thumb pointing in the direction of the current.

 

2. The diagram of the pattern of field lines is as follows,

 

3. The strength of the magnetic field is inversely proportional to the distance from the origin, the strength of the magnetic field will decrease as the place where the magnetic field is to be calculated is moved away from the straight conductor.

 

26. An object is placed at a distance of 10 cm from a convex mirror of focal length 15 cm. Find the position of the image formed by the mirror.

Ans: 

Section C

27. (B) A gas 'X' which is a deadly poison is found at the higher levels of atmosphere and performs an essential function.

Name the gas and write the function performed by this gas in the atmosphere. Which chemical is linked to the decrease in the level of this gas? What measures have been taken by an international organization to check the depletion of the layer containing this gas?

Ans: The gas you're referring to is likely ozone (O3). While ozone can be harmful at ground level, it plays a crucial role in the Earth's atmosphere by absorbing a portion of the sun's ultraviolet (UV) radiation, specifically UV-C and the majority of UV-B radiation. This absorption helps to shield the Earth's surface from these harmful rays, thereby protecting life on Earth from the damaging effects of excessive UV radiation such as skin cancer, cataracts, and damage to marine ecosystems.

The decrease in the level of ozone in the atmosphere is primarily linked to the release of chlorofluorocarbons (CFCs) and other ozone-depleting substances (ODS). These compounds were commonly used in refrigeration, air conditioning, aerosol sprays, and foam-blowing agents before their harmful effects on the ozone layer were understood.

To address the depletion of the ozone layer, an international agreement known as the Montreal Protocol was established in 1987. The Montreal Protocol aimed to phase out the production and consumption of ozone-depleting substances. Since its inception, the Montreal Protocol has been widely regarded as one of the most successful environmental treaties, leading to significant reductions in the atmospheric concentrations of ODS and allowing for gradual recovery of the ozone layer.

The measures taken under the Montreal Protocol include:

1. Phasing out the production and consumption of ozone-depleting substances: This involves setting specific timelines for the reduction and eventual elimination of the production and use of ODS, such as CFCs and halons.

2. Promotion of alternative technologies: The Montreal Protocol encourages the development and adoption of alternative technologies and substances that are less harmful to the ozone layer. This includes the use of hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs) as substitutes for CFCs and other ODS.

3. Compliance and enforcement mechanisms: The Protocol establishes mechanisms for monitoring and enforcing compliance with its provisions, including reporting requirements and penalties for non-compliance.

Overall, the Montreal Protocol serves as a critical framework for international cooperation in addressing ozone depletion and has been successful in significantly reducing the emission of ozone-depleting substances, thereby protecting the ozone layer and mitigating the harmful effects of UV radiation on the Earth's ecosystems and human health. 

 

28. Name and state the rule to determine the direction of a :

(1) magnetic field produced around a current carrying straight conductor.
(ii) force experienced by a current carrying straight conductor placed in a magnetic field which is perpendicular to it.

Ans: 

1. Magnetic Field Produced Around a Current Carrying Straight Conductor: To determine the direction of the magnetic field produced around a current-carrying straight conductor, you can use the right-hand grip rule. Here's how it works:

   • Imagine gripping the conductor with your right hand, with your thumb pointing in the direction of the current (the flow of positive charge).

   • Curl your fingers around the conductor. The direction your fingers curl will indicate the direction of the magnetic field lines around the conductor.

2. Force Experienced by a Current Carrying Straight Conductor Placed in a Magnetic Field: To determine the direction of the force experienced by a current-carrying straight conductor placed in a magnetic field, you can use the Fleming's left-hand rule. Here's how it works:

   • Extend your left hand and orient it such that the first finger (index finger) points in the direction of the magnetic field (B).

   • Extend your second finger (middle finger) in the direction of the current (I) flowing through the conductor.

   • Your thumb will then point in the direction of the force (F) experienced by the conductor.

These rules are fundamental in understanding the interactions between electric currents and magnetic fields, as described by the principles of electromagnetism.

 

30. Define reflex action. With the help of a flow chart show the path of a reflex action such as sneezing,

Ans: 

A reflex action is an involuntary and rapid response to a stimulus. It occurs without conscious thought and helps organisms quickly adapt to adverse circumstances that could potentially cause harm or danger. Reflexes are essential for survival and are often protective in nature.

Here’s how a reflex action works:

1. Stimulus Detection:

   • A sensory organ (such as the skin, eyes, or nose) detects a sudden change in the environment or an external stimulus.

   • For example, when dust or irritants enter the nasal passages, it triggers a sneeze reflex.

2. Neural Pathway:

   • The sensory neuron (afferent nerve) carries the signal from the receptor (sensory organ) to the spinal cord.

   • The signal travels through the dorsal nerve root into the Central Nervous System (CNS).

3. Relay Neuron (Interneuron):

   • In the spinal cord, a relay neuron (interneuron) receives the signal.

   • The relay neuron connects the sensory neuron to the motor neuron.

4. Motor Neuron (Efferent Nerve):

   • The relay neuron sends the signal to the motor neuron (efferent nerve).

   • The motor neuron carries the impulse away from the CNS toward the effector (muscle or gland).

5. Effector Response:

   • The effector (usually a muscle) produces an immediate response.

   • In the case of sneezing, the muscles involved in the process contract forcefully, expelling air from the nose and mouth.

Flowchart of a Reflex Action (Sneezing)

Remember that reflex actions bypass the brain and involve a rapid response directly from the spinal cord. They help protect our body from harm without conscious control. Sneezing, as demonstrated in this flowchart, is just one example of a reflex action.

31. (i) Which organisms have a three-chambered heart? Why do they have three-chambered hearts ?

Ans: 

(i) Organisms such as amphibians (like frogs) have three-chambered hearts. These hearts consist of two atria and one ventricle. The reason for having a three-chambered heart is primarily due to the amphibians' dual life, spending part of their life cycle in water and part on land. Here's why they have three chambers:

• Circulatory Efficiency: While a three-chambered heart is less efficient than a four-chambered heart, it still provides a level of separation between oxygenated and deoxygenated blood. Oxygen-rich blood returning from the lungs and skin can be partially separated from the oxygen-poor blood returning from the body. However, because the ventricle is only partially pided, some mixing of the blood still occurs.

• Adaptation to Dual Environments: Amphibians often have to adapt to both aquatic and terrestrial environments. The three-chambered heart is a compromise that allows them to adequately supply oxygen to their tissues in both environments. In water, where oxygen availability is higher, the efficiency of the three-chambered heart is sufficient. On land, amphibians can supplement oxygen exchange through their skin and lungs.

(ii) List two functions of lymph

Ans: 

• Fluid Balance: Lymph helps maintain fluid balance in the body by collecting excess interstitial fluid from the tissues. This fluid, along with dissolved substances and cellular debris, is transported through lymphatic vessels back into the bloodstream. By regulating the volume and composition of the interstitial fluid, lymphatic circulation helps prevent edema (excessive accumulation of fluid in the tissues).

• Immune Response: Lymph plays a crucial role in the body's immune defense system. Lymphatic vessels transport lymphocytes (a type of white blood cell), antibodies, and other immune cells and molecules to the lymph nodes, where foreign particles, pathogens, and abnormal cells are filtered out and destroyed. This process helps to detect and eliminate infections, pathogens, and other harmful substances from the body, contributing to overall immune function and defense.

 

32. A compound which is prepared from gypsum has the property of hardening when water is mixed in right quantity with it:
(i) Write common name and the chemical name of this compound.
(ii) Give chemical equation for its preparation.
(iii) List its two uses.

Ans: 

(i) Commonly known as "Plaster of Paris," the chemical name of the compound prepared from gypsum is calcium sulfate hemihydrate.

(ii) Chemical equation for its preparation:

(iii) Two uses of Plaster of Paris are:

• Construction and Building Materials: Plaster of Paris is widely used in the construction industry for making molds, casts, and decorative elements. When mixed with water to form a paste, it can be molded into various shapes and structures. Once it hardens, it provides a durable and fire-resistant surface, making it suitable for interior walls, ceilings, and decorative features.

• Medical Applications: Plaster of Paris is also extensively used in the medical field for creating casts to immobilize broken bones and support injured limbs during the healing process. When mixed with water, it forms a moldable paste that can be applied to the affected area and allowed to harden, providing support and protection to the injured limb. Additionally, Plaster of Paris casts are lightweight, breathable, and inexpensive, making them a preferred choice for medical casts.

 

33. (i) Define a decomposition reaction. Write chemical equation for the reaction that occurs when lead nitrate is heated strongly in a boiling tube.

Ans:  (i) Definition of Decomposition Reaction: A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. This can occur through various processes such as heating, electrolysis, or exposure to light.

Chemical equation for the decomposition of lead nitrate (Pb(NO3)2) when heated strongly: Pb(NO3)2→PbO+NO2+O2

This reaction produces lead(II) oxide (PbO), nitrogen dioxide (NO2), and oxygen gas (O2) as the products.

 

(ii) In electrolytic decomposition of water two gases are liberated at the electrodes. Give the mass ratio of the gas liberated at the cathode and at the anode.

Ans: 

Electrolytic Decomposition of Water: In the electrolytic decomposition of water, two gases are liberated at the electrodes: hydrogen gas (H2) is liberated at the cathode, and oxygen gas (O2) is liberated at the anode. The ratio of the masses of the gases liberated can be determined by the molar mass ratio of hydrogen to oxygen, which is 1:16.

The molar mass of hydrogen (H2) is approximately 2 g/mol, while the molar mass of oxygen (O2) is approximately 32 g/mol. Therefore, the mass ratio of hydrogen to oxygen is ​. This means that for every 1 gram of hydrogen liberated at the cathode, approximately 16 grams of oxygen will be liberated at the anode.

SECTION - D

(1) State whether the currents and potential difference in all the bulbs will be same or different when in a circuit three bulbs of:

(a) same wattage are connected in series.

(b) same wattage are connected in parallel.

(c) different wattage are connected in series.

(d) different wattage are connected in parallel.

Ans: (a) When three bulbs of the same wattage are connected in series:

• The current flowing through each bulb will be the same because in a series circuit, the current remains constant throughout the circuit.

• The potential difference across each bulb will be different. According to Ohm's law (V = IR), the potential difference across each bulb depends on its resistance, and since the bulbs are identical, their resistances are the same. However, the potential difference across each bulb will add up to the total potential difference of the circuit.

(b) When three bulbs of the same wattage are connected in parallel:

• The potential difference across each bulb will be the same because in a parallel circuit, the potential difference across each branch (bulb) is the same as the potential difference across the battery.

• The current flowing through each bulb will be different. Each bulb provides a separate pathway for the current to flow, so the total current supplied by the battery will divide among the bulbs based on their individual resistances.

(c) When three bulbs of different wattage are connected in series:

• The current flowing through each bulb will be the same, as in a series circuit, the current remains constant throughout.

• The potential difference across each bulb will be different. The potential difference across each bulb depends on its resistance and wattage, so bulbs with higher wattage will have higher potential differences across them compared to bulbs with lower wattage.

(d) When three bulbs of different wattage are connected in parallel:

• The potential difference across each bulb will be the same because in a parallel circuit, the potential difference across each branch (bulb) is the same as the potential difference across the battery.

• The current flowing through each bulb will be different. Each bulb provides a separate pathway for the current to flow, so the total current supplied by the battery will divide among the bulbs based on their individual resistances.

(ii) Two identical resistors of 24 Ω each are connected to a battery of 6 V. Calculate the ratio of the power consumed by the resulting combinations with (a) minimum resistance and (b) maximum resistance.

Ans: