Exercise: Power Electronics

Questions for: Power Electronics

Two thyristors of the same rating and specifications
A:
will have equal on state voltage drops
B:
will have equal forward blocking voltage for the same current
C:
will have different on state voltage drops
D:
may have equal or different on state voltage drops and equal or different forward blocking voltage's for the same current
Answer: D
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In a single phase semiconverter feeding a highly inductive load, the load current is
A:
sinusoidal
B:
nearly constant
C:
absolutely constant
D:
rectangular
Answer: B
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In auxiliary commutated chopper fed by voltage V and having L and C commutating elements, the peak value of capacitor current is
A:
B:
C:
D:
Answer: C
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Which of these devices is used in relaxation oscillator?
A:
UJT
B:
SCR
C:
DIAC
D:
TRIAC
Answer: A
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A NAND gate has 3 inputs and one output. The number of thyristors required for this gate are
A:
1
B:
2
C:
3
D:
3 or 4
Answer: C
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