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Current Electri...

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  • Question 1
    4 / -1

    In the absence of applied potential, the electric current flowing through a metallic wire is zero because

  • Question 2
    4 / -1

    Dimensions of a block are 1 cm × 1 cm × 100 cm. If specific resistance of its material is 3 × 10–7ohm-m, then the resistance between the opposite rectangular faces is

  • Question 3
    4 / -1

    In the above question, the resistance between the square faces is

  • Question 4
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    When an electrical appliance is switched on, it responds almost immediately, because

  • Question 5
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    The resistance of a wire of uniform diameter d and length L is R. The resistance of another wire of the same material but diameter 2d and length 4L will be

  • Question 6
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    It is easier to start a car engine on a hot day than on a cold day. This is because the internal resistance of the car battery

  • Question 7
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    5 ampere of current is passed through a metallic conductor. The charge flowing in one minute in coulomb will be

  • Question 8
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    A metal wire is subjected to a constant potential difference. When the temperature of the metal wire increases, the drift velocity of the electron in it

  • Question 9
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    An electric wire is connected across a cell of e.m.f. E. The current I is measured by an ammeter of resistance R. According to ohm\'s law

  • Question 10
    4 / -1

    The resistances of a wire at temperatures t° C and 0° C are related by

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