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Electric Circuits

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.
 8 A.
 10 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

 75 V.
 100 V.
 125 V.
 0 V.

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Electric Circuits
The plates of lead acid storage battery are most likely to be short circuited if

 sediment collect at the bottom of the battery.
 the electrolyte evaporates.
 too much water is added.
 the battery charged too slowly.

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Electric Circuits
The mass of a neutron of atom is

 1.609 × 10 - 31 Kg.
 1.672 × 10 - 26 Kg.
 1.602 × 10 - 19 Kg.
 1.675 × 10 - 27 Kg.

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Electric Circuits
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is

 0.5 F
 0.02 F
 0.05 F
 0.2 F

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

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

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