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Electric Circuits

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

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

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Electric Circuits
In the circuit shown in the figure, the value of Vs is 0, when I = 4 A. The value of I, when Vs = 16 V, is

 6 A.
 12 A.
 10 A.
 8 A.

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Electric Circuits
Power factor can be defined as

 cosine of angle between voltage and current.
 both option B and C.
 ratio of resistance versus impedance.
 sine of voltage and current.

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Electric Circuits
A circuit with resistor, inductor, capacitor in series is resonant of 50 Hz. If all the values are now doubled, the new resonant frequency is

 f0 / 4.
 f0 / 2.
 still f0.
 2f0.

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Electric Circuits
Twelve 6 Ω resistor used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is

 6 Ω.
 5 Ω.
 5 / 6 Ω.
 6 / 5 Ω.

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

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

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MORE MCQ ON Electric Circuits

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