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Electric Circuits

Electric Circuits
Active element of electrical circuit is

 voltage source.
 current source.
 both of them.
 none of above.

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Electric Circuits
Two wires of A and B of the same material and length ‘l’ and ‘2l’ have radius ‘r’ and ‘2r’ respectively. The ratio of their specific resistance will be

 1:8.
 1:1.
 1:2.
 4:1.

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Electric Circuits
If a function is shifted by 'T', then it is correctly represented as

 f (t) u (t).
 f (t) u (t-T).
 f (t-T) u (t-T).
 f (t-T) u (t).

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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 voltage drop across L is

 45.5 V.
 50.5 V.
  31.9 V.
  39.1 V.

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Electric Circuits
In Cauer 1st form last element in the network is

  Lshunt.
  Lseries.
  Cshunt.
  Cseries.

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Electric Circuits
The switch S is the circuit shown in figure is ideal. If the switch is repeatedly closed for 1 ms and opened for 1 ms, the average value of i(t) is

 1 mA.
  0.25 mA.
 0.35 mA.
 0.5 mA.

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