A lightning stroke discharges impulse current of 10 kA (peak) on a 400 kV transmission line having surge impedance of 250 N The magnitude of transient over-voltage travelling waves in either direction assuming equal distribution from the point of lightning strike will be

The topic of signs and systems

Instantaneous power output of a single phase 60 Hz generator will not be constant only under following condition: O A. The load draws only real power. O B. The load draws only reactive power. O C. None of the other choices are correct O D. The load is unbalanced. O E. The load draws bothreal and reactive power.

012 345 6 7 8 9 10 11 12 13 14 15 16 17 18 1 (ms) Sine wave A has a positive-going zero crossing at 20°. Sine wave B has a positive-going zero crossing at 45°. Determine the phase angle between the two signals. What signal leads ? A A-connected system can have wires. The (resultant) voltage between the hot legs (277V) is e. The phase angle between the phase voltage and the line voltage of a A-connected generator is degrees. 1