Circuit Theory Quiz | Circuit Theory Multiple Choice Questions and Answers
Questions
2
For a sine wave with peak value Emax______8.30. the average value is
Answer: 0.636 Emax
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6
For the same peak value, which of the following wave has the least mean value ?
Answer: half wave rectified sine wave
7
For the same peak value which of the following wave will ‘have the highest r.m.s. value ?
Answer: square wave
8
The r.m.s. value and mean value is the same in the case of
Answer: square wave
9
The power consumed in a circuit element will be least when the phase difference between the current and voltage is
Answer: 90°
10
Two waves of the same frequency have opposite phase when the phase angle between them is
Answer: 180°
11
The voltage of domestic supply is 220V. This figure represents
Answer: mean value
12
If two sine waves of the same frequency have a phase difference of JT radians, then
Answer: when one wave reaches its maxi¬mum value, the other will reach its minimum value
13
The peak value of a sine wave is 200 V. Its average value is
Answer: 127.4 V
14
If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is
Answer: a sinusoid of the same frequency
15
A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to
Answer: r.m.s. voltage
19
The reactance offered by a capacitor to alternating current of frequency 50 Hz is 20 Q. If frequency is increased to 100 Hz, reactance becomes_____ohms.
Answer: 10
20
A sine wave has a frequency of 50 Hz. Its angular frequency is _______ radian/second.
Answer: 100 n
