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AC Fundamentals, Circuit and Circuit Theory

AC Fundamentals, Circuit and Circuit Theory
For a sine wave with peak value Imax the r.m.s. value is

0.707
1.414 Imax
0.9
0.5 Imax

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AC Fundamentals, Circuit and Circuit Theory
The frequency of domestic power supply in India is

150 Hz
200 Hz
50 Hz
250 Hz

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AC Fundamentals, Circuit and Circuit Theory
At very low frequencies a series R-C circuit behaves as almost purely

Inductive
Resistive
Capacitive
None of the listed here

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AC Fundamentals, Circuit and Circuit Theory
In an AC. circuit, a low value of kVAR compared with kW indicates

Unity power factor
Maximum load current
Low efficiency
High power factor

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AC Fundamentals, Circuit and Circuit Theory
The phase difference between voltage and current wave through a circuit element is given as 30°. The essential condition is that

Both waves must have same frequency
Both waves must have zero value at the same time
Both waves must have identical peak values
None of these

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AC Fundamentals, Circuit and Circuit Theory
A sine wave has a frequency of 50 Hz. Its angular frequency is __________ radian/second.

50 jt
5 n
100 n
25 JT

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