Consider following power electronic circuits related to two-quadrant operation of d.c. drive:
1. Half controlled bridge converter
2. Fully controlled bridge converter
3. Dual converter
4. Chopper
Out of these statements:1
1, and 2 are correct
2
2, 3 and 4 are correct
3
2, and 3 are correct
4
4, 1 and 2 are correct