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Current Electricity Test - 38
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Current Electricity Test - 38

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  • Question 1/10
    4 / -1
    A rod of a certain metal is 1.0 m long and 0.6 cm in diameter. Its resistance is 3.0 ×10–3 ohm. Another disc made of the same metal is 2.0 cm in diameter and 1.0 mm thick. What is the resistance between theround faces of the disc?
    Solutions

  • Question 2/10
    4 / -1
    At what temperature will the resistance of a copper wire become three times its value at 0°C? (Temperature coefficient of resistance for copper= 4 × 10–3per ° C)
    Solutions

  • Question 3/10
    4 / -1
    An electron revolves 6 × 1015times/sec in circular loop.The current in the loop is
    Solutions

  • Question 4/10
    4 / -1
    The electron drift speed is small and the charge of the electron is also small but still, we obtain large currentin a conductor. This is due to
  • Question 5/10
    4 / -1
    If potential V = 100 ± 0.5 Voltand currentI = 10 ± 0.2 amp are given to us, then what will be thevalue of resistance?
    Solutions

  • Question 6/10
    4 / -1
    A nichrome wire 50 cm long and one square millimetre cross-section carries a current of 4A when connected to a 2V battery. The resistivity of nichrome wire in ohmmetre is
    Solutions

  • Question 7/10
    4 / -1
    If an observer is moving with respect to a stationaryelectron, then he observes
  • Question 8/10
    4 / -1
    Calculate the amount of charge flowing in 2 minutes in a wire of resistance 10 Ω when a potential difference of20 V is applied between its ends
    Solutions

  • Question 9/10
    4 / -1
    The number of free electrons per 100 mm of ordinary copper wire is 2 × 1021. Average drift speed of electrons is 0.25 mm/s. The current flowing is
    Solutions

  • Question 10/10
    4 / -1

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