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Electric Circuits

Electric Circuits
The norton equivalent of the circuit shown in the figure is

 0.75A, 5/6 Ohm
 0.75 A, 1.5 Ohm
 1A, 1.5 Ohm
 1A, 5/6 Ohm

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Electric Circuits
A 10 μF capacitor and 100 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow brightest?

 10 Hz.
 1 Hz.
 1000 Hz.
 100 Hz.

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Electric Circuits
In a capacitive circuit, the capacitive reactance is

 indirectly proportional to frequency
 directly proportional to frequency
 indirectly proportional to the square of frequency
 directly proportional to the square of frequency

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Electric Circuits
Which of the following has no units?

 Moment of a magnet
 Permittivity
 Magnetic susceptibility
 Permeability

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Electric Circuits
The rms value of the resultant current in a wire which carries a DC current of 10A and a sinusoidal current of peak value 20A is

 22.4A.
 14.14A.
 17.3A .
 30A.

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Electric Circuits
What is the relation between line voltage and phase voltage in case of delta connection?

 VL = 1/ √3 VP.
 None of these.
 VL = √3 VP.
 VL = VP.

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