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Electric Circuits

Electric Circuits
To obtain a high value of capacitance, the permittivity of dielectric medium should be

 unity
 low
 high
 zero

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Electric Circuits
Air gap flux density is of the order of

  0.65 - 0.9 T.
 0.85 - 0.9 T.
  0.35 - 0.5 T.
 0.75 - 0.8 T.

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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

 still f0.
 2f0.
 f0 / 2.
 f0 / 4.

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Electric Circuits
Resistance of which material does not change with change in temperature?

 Platinum.
 Brass.
 Tungsten.
 Metal alloys constantan and manganin.

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Electric Circuits
What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?

 19.
 39.
 38.
 20.

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Electric Circuits
If emf in a given circuit is given by e = 100 sinω0t, then maximum value of voltage and frequency will be

 50√2 V, 100 Hz.
 100√2 V, 100 Hz.
 100 V, 100 Hz.
 100 V, 50 Hz.

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MORE MCQ ON Electric Circuits

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