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Electric Circuits

Electric Circuits
Power dissipation in ideal inductor is

 A finite value
 Maximum
 Minimum
 Zero

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Electric Circuits
The Laplace Transform of a shifted unit step f (t) = U (t-a) is

 s(1-e-as).
 se-as.
 e-as.
 (e-as)/s.

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Electric Circuits
The resistivity of semi-conductors at room temperatures is

 0.01 to 50 ohm - cm.
 1.6 × 106 to 100 × 106 ohm - cm.
 109 to 1012 ohm - cm.
 1000 to 1500 ohm - cm.

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Electric Circuits
Magnetic flux has the unit of

 Ampere turn
 Weber
 Newton
  Tesla

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Electric Circuits
A voltage of v = 100 sin (wt + π/3) is applied to pure resistor of 30 Ohm. What is the RMS value of current is

 5.77.
 1.92.
 4.71.
 2.36.

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Electric Circuits
The resistance of a strip of copper of rectangular cross section is 2 Ω. A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be

 3 / 2 Ω.
 3 / 4 Ω.
 4 / 3 Ω.
 6 Ω.

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MORE MCQ ON Electric Circuits

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