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Electricity and...

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  • Question 1
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    Which of the following is false about an electric cell?

  • Question 2
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    In a simple voltaic cell, the negative electrode is made of

  • Question 3
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    Choose the incorrect statement among the following.

  • Question 4
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    What will happen if you join the two terminals of a cell without connecting them through a switch or bulb?

  • Question 5
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    In which of the following circuits will the bulb glow?


  • Question 6
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    What will happen when an extra bulb is inserted in a circuit?

  • Question 7
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    In which of the following circuits will the bulbs not glow?

  • Question 8
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    In the above circuit, the lamps don't glow. What is the reason?

  • Question 9
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    The given circuit diagram shows identical lamps A and B, connected in series with a battery. The lamps glow with normal brightness. A third lamp Z is connected in parallel with lamp B. What will happen to the brightness of lamp A?

  • Question 10
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    The handles of the tools like pliers, used by electricians for repair work, usually have plastic covers over them. What is the reason?

  • Question 11
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    Study the following table and figure out the wrongly categorised material.

    Non-conductors of Electricity Conductors of Electricity
    Cotton Steel
    Plastic Silver
    Copper Iron
    Rubber Brass
    Wool Gold

  • Question 12
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    Which of the following statements is NOT true?

  • Question 13
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    Seema was making a circuit using a wire, switch and a bulb, but she was running short of the connecting wires. To complete the circuit, she may use a

  • Question 14
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    Pick the correct statement.

  • Question 15
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    What should be present in a substance for it to be a conductor of electricity?

  • Question 16
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    The filament of a torch bulb is fixed to two thicker wires. One thick wire is connected to the ________ and the other thick wire is connected to the ___________.

  • Question 17
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    Match the columns:

    Column I Column II
    A. Covering of switches, appliances, plugs and sockets is made of insulators P. is a simple device that either breaks the circuit or completes it.
    B. When the terminals of the bulb are connected with those of the electric cell by wires, then Q. because they don't allow current to pass through them, so we don't get a shock if we touch them.
    C. Electric switch R. the current passes through the filament of the bulb. This makes the bulb glow.
    D. Electric cell S. is a device which converts chemical
    energy into electrical energy.

  • Question 18
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    In the given circuit, which of the switches have to be closed so that only A and D bulbs glow?

  • Question 19
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    In the given circuit, which of the following switches have to be closed so that only A and E bulbs glow?

  • Question 20
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    Which of the following is/are the correct reason(s) for using tungsten in an incandescent bulb?

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