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Electricity and...

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  • Question 1
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    How many electrons constitute a current of one coulomb?

  • Question 2
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    An ebonite rod is rubbed with fur. Which of the following statements is true?

  • Question 3
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    Two bodies A and B are rubbed together. Which of the following statements is true?

  • Question 4
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    Good conductors have many loosely bound

  • Question 5
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    Ampere – second stands for the unit of

  • Question 6
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    Which of the following statements is correct for the movement of electrons between two points?

  • Question 7
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    Voltage can be generated

  • Question 8
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    Which of the following is a correct relationship between a volt and coulomb?

  • Question 9
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    What is the resistance of the light bulb that carries a current of 3 amperes when it is connected to a 120 volts circuit?

  • Question 10
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    What is the strength of current flowing through a 20 resistance coil if it is connected with 4 volt battery?

  • Question 11
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    What will be the resistance of a conductor whose V-I graph is shown below?

  • Question 12
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    An electric bulb is marked as `100 W - 220 V`. What is the current flowing through its filament?

  • Question 13
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    An electric heater of 1000 watt is used for 5 hours everyday. What is the amount of electrical energy consumed in 30 days?

  • Question 14
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    An electric geyser draws a current of 10 amperes at 220 V. What is the cost of running it for 2 hours everyday in a month of 30 days, if the cost of electricity is Rs.1.20 per unit?

  • Question 15
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    Which of the following is a natural magnet?

  • Question 16
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    Which of the following statements is NOT true?

  • Question 17
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    Which of the following materials are magnetic in nature?
    (i) Iron nail
    (ii) Key of a car
    (iii) Leather
    (iv) Rubber ball
    (v) Metal door handle

  • Question 18
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    Which of the following statements is NOT true?

  • Question 19
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    By which of the following devices is consumed electrical energy measured?

  • Question 20
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    How many types of wire do all house hold electric circuits consist of?

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