Electricity and Circuits Test

Result

Electricity and Circuits Test - 12

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The components required to make a simple series circuit to light a bulb are

A
Wires and cell

B
Cell and switch

C
Bulb and wires

D
Both B and C

Solution

The component required to make a simple series circuit to light a bulb are
$$\rightarrow$$ Cells
$$\rightarrow$$ Switch
$$\rightarrow$$ Bulbs
$$\rightarrow$$ Wires
Question 2
1 / -0

Why are switches/keys used in a circuit?

A
To save power

B
To protect the system

C
To control a device

D
All of above

Solution

Switches allow the user of gadget to turn off the gadget when not required. Hence, A and C follows.
Using a device only when required reduced the wear and tear and protects the system. Hence, B is correct. hence A , b and C all are correct that's why option D is answer.
Question 3
1 / -0

In an open electric circuit

A
the path of electric current is completely broken

B
the path of electric current is not broken

C
the path of electric current is partially broken

D
none of these

Solution

An electric circuit in which the normal path of current has been interrupted, by the disconnection of one part of its conducting pathway from another, is called open electric circuit.In open circuit the path for current is completely broken or incomplete because current only flows in closed path.
Question 4
1 / -0

In a circuit having one bulb, another bulb is added in series with another. Then the bulbs will :

A
Not glow

B
glow but less brigtly

C
glow more brightly

D
get fused

Solution

The relation between the brightness and the current is $$Brightness\propto\ Current$$
In a circuit, if one more bulb is added in series with the other, the net resistance of the circuit increases, and hence the current decreases.
Hence the bulbs will glow but less brightly.
Question 5
1 / -0

The substance which allows electric current to flow through it is called

A
Conductor

B
Insulator

C
Semiconductor

D
None of these

Solution

The substance which allows electric current to pass through it are called $$conductor.$$

Answer-(A)
Question 6
1 / -0

Human body is a

A
good conductor of electricity

B
poor conductor of electricity

C
semiconductor

D
good insulator

Solution

Human body is a good conductor of electricity which allow electric current to flow.

Answer-(A)
Question 7
1 / -0

What is false in an ideal Electrical Circuit?

A
Internal Resistance of battery is zero

B
Resistance of connecting wires is zero

C
Wires are heated

D
EMF of cell remains same

Solution

In an ideal Electrical circuit, the conducting wires do not offer any resistance, i.e. $$R=0$$. From Joule's heating law: $$H=i^2Rt$$. Since $$R=0$$ therefore $$H=0$$. Thus, the complete electrical power from the source is delivered to the load and there is no loss of energy in the form of heat.
The heating of wires signifies energy lost as heat and is not a property of the Ideal Electrical Circuit.
Question 8
1 / -0

Conducting wires in a circuit are usually made up of

A
Copper

B
Iron

C
Magnet

D
Fiber

Solution

$$Copper$$ being good conductor and cheaply available are used as conducting wires in circuit.

Answer-(A)
Question 9
1 / -0

Why is a fuse used in an electrical appliance?

A
To earth the appliance

B
To protect the appliance and its cable

C
To change the efficiency of the appliance

D
To change the current rating of the appliance

Solution

An electric fuse is a safety device used to limit the current in an electric circuit. The use of a fuse is to safeguard the electric circuit and the electric appliances connected in the electric circuit from being damaged.
Question 10
1 / -0

Which of the following devices can be used to break an electric circuit:

A
Cell

B
Bulb

C
Switch

D
None of these

Solution

The switch is a simple device that is used to either break the electric circuit or to complete it.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Electricity and Circuits Test - 12

Result

Electricity and Circuits Test - 12

Score

-

Rank

-

SHARING IS CARING

Question 1

Wires and cell

Cell and switch

Bulb and wires

Both B and C

Solution

Question 2

To save power

To protect the system

To control a device

All of above

Solution

Question 3

the path of electric current is completely broken

the path of electric current is not broken

the path of electric current is partially broken

none of these

Solution

Question 4

Not glow

glow but less brigtly

glow more brightly

get fused

Solution

Question 5

Conductor

Insulator

Semiconductor

None of these

Solution

Question 6

good conductor of electricity

poor conductor of electricity

semiconductor

good insulator

Solution

Question 7

Internal Resistance of battery is zero

Resistance of connecting wires is zero

Wires are heated

EMF of cell remains same

Solution

Question 8

Copper

Iron

Magnet

Fiber

Solution

Question 9

To earth the appliance

To protect the appliance and its cable

To change the efficiency of the appliance

To change the current rating of the appliance

Solution

Question 10

Cell

Bulb

Switch

None of these

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.