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Electric Circuits

Electric Circuits
Which of following is the unit of magnetic flux density?

 Daraf.
 Tesla.
 Weber.
 Lumens.

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Electric Circuits
What is the frequency of domestic power in India?

 60 Hz.
 220 Hz.
 50 Hz.
 70 Hz.

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Electric Circuits
Which part of magnetic path requires largest mmf?

 Air gap.
 Coil.
 Inductance.
 Core.

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Electric Circuits
For steady state current inductor acts as

 Voltage source
 Short circuit
 Open circuit
 Current source

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

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

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Electric Circuits
The capacitance of a conductor is varying from 2 microfarad to zero in 1 sec linearly if the voltage applied to it is 6 V the energy stored in 0.5 sec in the condenser is

 18 µ joules.
 20 µ joules.
  55.1 µ joules.
 10 µ joules.

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MORE MCQ ON Electric Circuits

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