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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
In a loss-free R-L-C circuit the transient current is

Oscillating
Square wave
Non-oscillating
Sinusoidal

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AC Fundamentals, Circuit and Circuit Theory
The safest value of current the human body can carry for more than 3 second is

4 mA
5 mA
15 mA
9 mA

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AC Fundamentals, Circuit and Circuit Theory
The equation of 50 Hz current sine wave having r.m.s. value of 60 A is

42.42 sin 314 t
60 sin 25 t
60 sin 50 t
84.84 sin 3141

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AC Fundamentals, Circuit and Circuit Theory
Power factor of the following circuit will be unity

Resistance
Capacitance
None of the listed here
Inductance

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AC Fundamentals, Circuit and Circuit Theory
In a pure inductive circuit if the supply frequency is reduced to 1/2, the current will

Be four times as high
Be reduced to one fourth
Be doubled
Be reduced by half

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AC Fundamentals, Circuit and Circuit Theory
The product of apparent power and cosine of the phase angle between circuit voltage and current is

Reactive power
Volt-amperes
Instantaneous power
True power

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