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1.
The form factor is the ratio of
2.
In each of the three coils of a three phase generator, an alternating voltage having an r.m.s. value of 220 V is induced. Which of the following values is indicated by the voltmeters?
3.
The period of a sine wave is ___________ seconds. Its frequency is
4.
The time constant of the capacitance circuit is defined as the time during which voltage
5.
The square waveform of current has following relation between r.m.s. value and average value.
6.
The r.m.s. value of pure cosine function is
7.
The phosphors for which of the following pair are 180
8.
The r.m.s. value of half wave rectified sine wave is 200 V. The r.m.s. value of full wave rectified AC. will be
9.
In an AC. circuit, a low value of kVAR compared with kW indicates
10.
If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is