11) How to decrease the turn OFF time of thyristor
a) by increase the recombination process of excess charges
b) by decrease the recombination process
c) by increase the excess charges in the thyristor
d) none
12) Which is the best method for turn ON more than one thyristor at a time
a) forward voltage triggering
b) light triggering
c) gate triggering
d) all above
13) Which supply supports natural commutation in thyristor circuit
a) DC supply
b) AC supply
c) both
d) pulsed DC supply
14) Which elements are supported for natural commutation in thyristor circuit
a) capacitor
b) inductor
c) capacitor and inductor
d) none
15) Which of the following firing circuit is supports 180 degree operation
a) resistance firing circuit
b) capacitor firing circuit
c) both
d) none
16) Why UJT firing circuit is not used practically for turn ON the thyristor
a) it produces less pulses
b) it produces pulses in unwanted situations
c) UJT is not a firing circuit
d) none
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