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Electric Circuits

Electric Circuits
Internal resistance of ideal voltage source is

 100 ohms
 zero
 finite
 infinite

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Electric Circuits
A positive and a negative charged conductor are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be

 25 times larger than before.
 5 times smaller than before.
 5 times greater than before.
 10 times greater than before.

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Electric Circuits
A capacitor in a circuit became hot and ultimately exploded due to wrong connection, which type of capacitor it could be?

 Paper capacitor.
 Ceramic capacitor.
 Any of above.
 Electrolytic capacitor.

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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

 4.71.
 1.92.
 2.36.
 5.77.

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The current in R is

 10.16 A.
 5.08 A.
 1.27 A.
 2.54 A.

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Electric Circuits
A conductor of length l meters moves at right angles to a uniform magnetic field of flux density B = 1.5 T. if the velocity of revolution of the conductor is 50 ms-1 then induced e.m.f. in the conductor is

 0 V.
 75 V.
 125 V.
 100 V.

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MORE MCQ ON Electric Circuits

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