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Electric Circuits

Electric Circuits
In direct arc furnace which of following is of high value?

 Current.
 Power factor.
 All of above.
 Voltage.

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Electric Circuits
Find the Z parameters of the circuit shown in figure.

 Z11 = 1; Z12 = 1; Z21 = 1; Z22 = 1
 Z11 = 3; Z12 = 1; Z21 = 1; Z22 = 3
 Z11 = 3; Z12 = 3; Z21 = 3; Z22 = 3
 Z11 = 2; Z12 = 1; Z21 = 1; Z22 = 2

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Electric Circuits
The capacity of a cell is measured in

  watt-hours.
  watts.
  amperes.
  ampere-hour.

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Electric Circuits
The time required for a pulse to change from 10 % to 90 % of its maximum value is known as

 fall time.
 run time.
 decay time.
 rise time.

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Electric Circuits
In series R, L circuit power factor can be defined as

 Vr/V
All of these
 R/Z
 P/S

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Electric Circuits
One ampere hour charge is equivalent to

 3600 coulombs.
 36 coulombs.
 36000 coulombs.
 360 coulombs.

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