Two waves of the same frequency have opposite phase when the phase angle between them is_________?

A. Square wave
B. Sine wave
C. Half wave rectified sine wave
D. Triangular wave

A. is unaffected by the supply frequency
B. decreases with the increase in supply frequency
C. increases with the increase in supply frequency
D. becomes zero with the increase in supply frequency

A. true power
B. reactive power
C. volt-amperes
D. instantaneous power

A. 20 Hz
B. 30 Hz
C. 40 Hz
D. 50 Hz

A. apparent power
B. true power
C. reactive power
D. none of the above

A. R only
B. L only
C. C only
D. LorC
E. R,LorC