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Current Electricity Test - 5
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Current Electricity Test - 5
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  • Question 1/10
    4 / -1
    With the rise of temperature the resistivity of a semiconductor
  • Question 2/10
    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 3/10
    4 / -1
    The resistance of a straight conductor does not depend on its
    Solutions

  • Question 4/10
    4 / -1
    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
    Solutions

  • Question 5/10
    4 / -1
    Metals have
    Solutions

  • Question 6/10
    4 / -1
    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 7/10
    4 / -1
    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
    Solutions

  • Question 8/10
    4 / -1
    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
    Solutions

  • Question 9/10
    4 / -1
    In which of the following substances does resistance decrease with increase in temperature?
  • Question 10/10
    4 / -1
    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
    Solutions

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