If two sine waves of the same frequency have a phase difference of JT radians, then_______?

A. Both will reach their minimum values at the same instant
B. Both will reach their maximum values at the same instant
C. When one wave reaches its maxi¬mum value, the other will reach its minimum value
D. None of the above

A heater is rated as 230 V, 10 kW, A.C. The value 230 V refers to__________?

A. Average voltage
B. R.m.s. voltage
C. Peak voltage
D. None of the above

The voltage of domestic supply is 220V. This figure represents__________?

A. Mean value
B. R.m.s. value
C. Peak value
D. Average value

If two sinusoids of the same frequency but of different amplitudes and phase angles are subtracted, the resultant is____________?

A. A sinusoid of the same frequency
B. A sinusoid of half the original frequency
C. A sinusoid of double the frequency
D. Not a sinusoid

The period of a wave is___________?

A. The same as frequency
B. Time required to complete one cycle
C. Expressed in amperes
D. None of the above

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. 2.5
B. 5
C. 10
D. 15

The form factor is the ratio of_______?

A. Peak value to r.m.s. value
B. R.m.s. value to average value
C. Average value to r.m.s. value
D. None of the above

A sine wave has a frequency of 50 Hz. Its angular frequency is ________ radian/second.

A. 100 n
B. 50 jt
C. 25 jt
D. 5 n

Which of the following is the most likely source of harmonics in a transformer ?

A. Poor insulation
B. Overload
C. Loose connections
D. Core saturation

Which PTI minister has resigned from his portfolio over accused of being involved in occupying state land & Alleged abuse of power?

A. Babar awan
B. Azam swati
C. Jahangir tareen
D. All of these