1
GATE EE 1994
Subjective
+1
-0
Match the following

List $$-$$ $${\rm I}$$
$$A.$$ Commutation
$$B.$$ $$V$$ $$-$$ Curves
$$C.$$ Free wheeling diode
$$D.$$ Overlap

List $$-$$ $${\rm II}$$
$$P.$$ Resistive load
$$Q.$$ Inductive load
$$R.$$ Capacitive load
$$S.$$ Inter pole
$$T.$$ Source Inductance
$$U.$$ Synchronous motor

2
GATE EE 1993
MCQ (Single Correct Answer)
+1
-0.3
A chopper operating at a fixed frequency is feeding an $$R$$-$$L$$ load. As the duty ratio of the chopper is increased from $$25\% $$ to $$75\% $$, the ripple in the load current
A
Remains constant
B
Decreases, reaches a minimum at $$50\% $$ duty ratio and then increases
C
Increases, reaches a maximum at $$50\% $$ duty ratio and then decreases
D
Keeps on increasing as the duty ratio is increased
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