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Current Electri...

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  • Question 1
    4 / -1

    With the rise of temperature the resistivity of a semiconductor

  • Question 2
    4 / -1

    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 3
    4 / -1

    The resistance of a straight conductor does not depend on its

  • Question 4
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    An electric current passes through a circuit containing two wires of the same material connected in parallel. If the lengths of the wires are in the ratio of 4/3 and radius of the wires are in the ratio of 2/3, then the ratio of the currents passing through the wires will be

  • Question 5
    4 / -1

    Metals have

  • Question 6
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    The electron dirft speed is small and the charge of the electron is also small but still, we obtain large current in a conductor. This is due to

  • Question 7
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    The resistance of a wire is 5 Ω at 50°C and 6Ω at 100°C. The resistance of the wire at 0°C will be

  • Question 8
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    The length of a given cylindrical wire is increased by 100%. Due to the consequent decrease in diameter the change in the resistance of the wire will be

  • Question 9
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    In which of the following substances does resistance decrease with increase in temperature?

  • Question 10
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    An aluminium (resistivity p = 2.2 × 10–8 Ω -m) wire of a diameter 1.4 mm is used to make a 4 Ω resistor. The length of the wire is

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