01. The period of a wave is
time required to complete one cycle
02. The form factor is the ratio of
r.m.s. value to average value
03. Two waves of the same frequency have opposite phase when the phase angle between them is
180°
04. The r.m.s. value and mean value is the same in the case of
square wave
05. For the same peak value which of the following wave will ‘have the highest r.m.s. value ?
square wave.
06. For the same peak value, which of the following wave has the least mean value ?
half wave rectified sine wave
07. Capacitive reactance is more when
capacitance is less and frequency of supply is less
08. In a series resonant circuit, the impedance of the circuit is
minimum
09. The best place to install a capacitor is
across the terminals of the inductive load
10. In a highly capacitive circuit the
reactive power is more than the actual power
11. Power factor of the following circuit will be unity
resistance
12. In a loss-free R-L-C circuit the transient current is
sinusoidal
13. The double energy transient occur in the
R-L-C circuit
14. In a pure resistive circuit
current is in phase with the voltage
15. Inductance of coil
increases with the increase in supply frequency
16. In any A.C. circuit always
apparent power is more than actual power.
17. In a purely inductive circuit
actual power is zero.
18. Power factor of electric bulb is
Unity.
19. Which of the following coil will have large resonant frequency ?
A coil with large distributed capacitance
20. In an AC. circuit, a low value of kVAR compared with kW indicates
high power factor
21. The ratio of active power to apparent power is known as factor.
Power.
22. The purpose of a parallel circuit resonance is to magnify
Voltage.
23. In an A.C. circuit power is dissipated in
resistance only.
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