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Electric Circuits

Electric Circuits
The rms value of the voltage U(t)= 3 + 4cos(3t)

 7 V.
  5 V.
 {3 + 2(1.141)} V.
  4.123 V.

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Electric Circuits
To reduce hysteresis loss, we use

 copper bars.
 CRGO steel.
 laminated sheets.
 soft-iron.

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Electric Circuits
Power dissipation in ideal inductor is

 Minimum
 A finite value
 Maximum
 Zero

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Electric Circuits
A cube of material of side 1 cm has a resistance of 0.002 Ω between its opposite faces. If the same volume of the material has a length of 4 cm and a uniform cross - section, the resistance of this length will be

 0.064 Ω.
 0.016 Ω.
  0.032 Ω.
  0.128 Ω.

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Electric Circuits
What is called the frequency in AC operation?

 No. of (-) ve quadrature made per second.
 No. of cycles made per second.
 No. of wave made per second.
 No. of (+) ve quadrature made per second.

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Electric Circuits
The breakdown voltage for paper capacitor is usually

 more than 10000 volts.
 2000 to 3000 volts.
 20 to 60 volts.
 200 to 1600 volts.

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MORE MCQ ON Electric Circuits

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