A crowbar is a circuit which is used to protect a_____________?

A crowbar is a circuit which is used to protect a_____________?

A. voltage sensitive load from excessive dc power supply output voltages
B. current sensitive load from excessive dc power supply output voltages
C. voltage sensitive load from excessive ac power supply output voltages
D. current sensitive load from excessive ac power supply output voltages

The advantage of using free – wheeling diode in half controlled bridge converter is that

The advantage of using free – wheeling diode in half controlled bridge converter is that

A. There is always a path for the dc current independent of the ac line
B. There is always a path for the ac current independent of the ac line
C. There is always a path for the dc current dependent of the ac line
D. There is always a path for the ac current independent of the ac line