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Current Electri...

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  • Question 1
    4 / -1

    The reciprocal of resistance is

  • Question 2
    4 / -1

    A solenoid is at potential difference of 60 V and current flowing through it is 15 ampere, then the resistance of coil will be

  • Question 3
    4 / -1

    All of the following statements are true except

  • Question 4
    4 / -1

    A potential difference of V is applied at the ends of a copper wire of length 1 and diameter d. On doubling only d, drift velocity

  • Question 5
    4 / -1

    The resistance of a discharge tube is

  • Question 6
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    We are able to obtain fairly large currents in a conductor because

  • Question 7
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    Two resistances of 10 Ω and 20 Ω and an inductor of inductance 5 H are connected to a battery of 2V through a key k as shown in the figure. At time t = 0, when the key k is dosed the initial current through thebattery is

  • Question 8
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    In a wire of circular cross–section with radius r, free electrons travel with a drift velocity V when a current I flows through the wire. What is the current in another wire of half the radius and of the same material when the drift velocity is 2V?

  • Question 9
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    The resistivity of a wire depends on its

  • Question 10
    4 / -1

    The conductivity of a superconductor is

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