Electric Circuits
The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is

  55.1 µ joules.
 10 µ joules.
 18 µ joules.
 20 µ joules.

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Electric Circuits
Pure metal generally have

  high conductivity and large temperature coefficient.
  low conductivity and zero temperature coefficient.
  low conductivity and high temperature coefficient.
  high conductivity and low temperature coefficient.

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