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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Regenerative.
  Dynamic.
  None of these.
  Plugging.

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Electric Circuits
In the circuit shown in the figure the voltage across the 2 Ω resistor is

 2 V.
 4 V.
 1 V.
 3 V.

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Electric Circuits
Coating generally recommended for hard surfacing is

 chromium plating.
None of these
 lead plating.
 copper plating.

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Electric Circuits
A two port network is defined by the relation The value of Z11 is

 2.
 -2/11.
 -3.
 2/11.

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Electric Circuits
What is the value of charge of an electron?

 1.6022 × 10-19 Coulomb
 1.6022 × 10-7 Coulomb
 1.6022 × 10-27 Coulomb
 1.6022 × 10-8 Coulomb

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Electric Circuits
If the length of a wire of resistance R is uniformly stretched to n times its original value, what will be its new resistance

  n2R.
  R / n2.
  nR .
  n2 / R.

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