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Electric Circuits

Electric Circuits
Capacitors for P.f correction are rated in

 KW.
 KV.
 KVA.
 KVAR.

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Electric Circuits
Which of the followings is/are active element?

 Voltage source
 None of these.
 Current source
 Both

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the rms value in Amperes.

 1.57 A.
 0.741 A.
 0.494 A.
 1.414 A.

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Electric Circuits
Three resistances have the following ratings 150 Ω at 5 %, 100 Ω at 5 % and 200 Ω at 5 % respectively. The percentage error when all the three are connected in series will be

 + 8 %.
  + 5 %.
  + 6 %.
 + 7 %.

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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 phase angle of current in respect of supply voltage will be

 32.1o.
 28.8o.
 40.4o.
 20.2o.

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Electric Circuits
Three capacitors each of capacity C are given. The resultant capacity (2/3) C can obtained by using them

 all in series.
 two in series and third in parallel across this combination.
 all in parallel.
 two in parallel and third in series with this combination.

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