For a frequency of 200 Hz, the time period will be
For a sine wave with peak value Emax______8.30. the average value is
Form factor for a sine wave is
Form Factor is the ratio of
Answer: r.m.s. value/average value
For a sine wave with peak value Imax the r.m.s. value is
For the same peak value, which of the following wave has the least mean value ?
Answer: half wave rectified sine wave
For the same peak value which of the following wave will ‘have the highest r.m.s. value ?
The r.m.s. value and mean value is the same in the case of
The power consumed in a circuit element will be least when the phase difference between the current and voltage is
Two waves of the same frequency have opposite phase when the phase angle between them is
The voltage of domestic supply is 220V. This figure represents
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
The peak value of a sine wave is 200 V. Its average value is
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
A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to
The period of a sine wave is _____ seconds.
Its frequency is
The form factor is the ratio of
Answer: r.m.s. value to average value
The period of a wave is
Answer: time required to complete one cycle
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.
A sine wave has a frequency of 50 Hz. Its angular frequency is _______ radian/second.