The turn-on time of a SCR with inductive load is 20 s. The

The turn-on time of a SCR with inductive load is 20 s. The pulse train frequency is 2.5 kHz with a mark/space ratio of 1/10, then the SCR will

1. turn on
2. not turn on
3. turn on if inductance is removed
4. turn on if pulse frequency is increased to two times.

Pulse Repetition Rate (PRR) =	1	= 0.4 ms = 400 s
	2.5 × 10³

Mark / space ratio =	1
	10

Pulse width =	400	= 36.4 μs
	11

The SCR will turn ON because the pulse width is more than SCR turn ON time.