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Electric Circuits

Electric Circuits
In which braking back emf exceeds supply voltage?

  Regenerative.
  None of these.
  Dynamic.
  Plugging.

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Electric Circuits
If the dielectric of a capacitor is replaced by conducting material

 the plate will get short circuited.
 the capacitor will get heated up due to eddy currents.
 the capacitor can store infinite charge.
 the capacitance value of the plate will decrease.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The current in R is

 5.08 A.
 10.16 A.
 1.27 A.
 2.54 A.

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Electric Circuits
Container of a lead acid battery

 ceramics.
 celluloid.
 any of above.
 molded hard rubber.

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Electric Circuits
For the circuit shown in the given figure the current I is given by

 2 A.
 1 A.
 3 A.
 4 A.

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Electric Circuits
Current efficiency in electroplating is usually

  99 %.
  70 to 80 %.
  90 to 98 %.
  50 to 60 %.

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