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Electric Circuits

Electric Circuits
Specific resistance is measured in

  ohm - cm.
  ohm/cm.
  ohm.
  mho.

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Electric Circuits
Poorest conductor of electricity is

  Carbon.
  Steel.
  Aluminium.
  Silver.

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Electric Circuits
A positive and a negative charged conductor are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

 25 times larger than before.
 10 times greater than before.
 5 times greater than before.
 5 times smaller than before.

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Electric Circuits
The unit of resistivity is

 Ω / metre.
 Ω - metre.
 Ω / m².
 Ω.

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Electric Circuits
If N is the number of nodes and b is the number of branches in a network, then rank of tie set matrix is

 b - N + 1.
 N - 1.
 b - N - 1.
 N.

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Electric Circuits
If a capacitors of capacitance 100 μF is connected across a voltage source of 10 V, then what will be the energy stored in that capacitor?

 5 × 10 - 3 Joule.
 10 × 10 6 Joule.
 10 × 10 - 3 Joule.
 5 × 10 - 2 Joule.

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