Power Electronics - Engineering

Q1:

Figure shows a chopper feeding RLE load, The free wheeling diode conducts when

A thyristor is on

B thyristor is off

C both when thyristor is on and thyristor is off

D partly when thyristor is off and partly when thyristor is on

ANS:B - thyristor is off

FD is forward biased only when thyristor is off.