A phase difference of 90 degrees is equal to:
- A. pi radians
- B. pi/2 radians
- C. 2 pi radians
- D. pi/4 radians
Explanation
A complete cycle is 360 degrees or 2 pi radians, so 90 degrees is a quarter of a cycle, that is pi over 2 radians. This is the phase difference between current and voltage in a purely capacitive or purely inductive AC circuit, which is why no net power is dissipated in either. The Greek letter did not print cleanly in the original paper.
Related questions
The frequency of the alternating mains supply in Pakistan is
Alternating current cannot be measured with a moving coil galvanometer directly because
The peak value of an alternating current whose rms value is 10 A is about
The root mean square value of an alternating current is
If the peak voltage of an AC supply is 311 V, its rms value is about