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Electric Circuits

Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 15.
 75.
 105.
 60.

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Electric Circuits
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF. Find the time constant of the circuit?

 2 μsec
 4 msec
 1 μsec
 2 msec

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Electric Circuits
Which of the following has no units?

 Permeability
 Permittivity
 Magnetic susceptibility
 Moment of a magnet

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Electric Circuits
In series RLC circuit, voltage across resistor, inductor and capacitor are 5V, 2V and 2V respectively. Find total voltage?

 9V
 2V
 4V
 5V

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Electric Circuits
Total instantaneous power supplied by a 3 - φ AC supply to a balanced RL load is

 zero.
 pulsating with zero average.
 constant.
 pulsating with non zero average.

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Electric Circuits
If all the elements in a particular network are linear, then the superposition theorem would hold, when the excitation is

 Either AC or DC
 DC only
 AC only
 An Impulse

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