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Electronics and Communication Engineering - Power Electronics

Exercise : Power Electronics - Section 8
26.
The load circuit of a single phase full bridge inverter
must be underdamped
must be overdamped
may be underdamped or overdamped
may be any type of load
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
When an SCR is reverse biased
two junctions are reverse biased and one junction is forward biased.
all the three junctions are reverse biased.
one junction is reverse biased and two junctions are forward biased.
any of the above depending on the magnitude of reverse bias.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
A dc series motor is coupled to a load whose torque is proportional to speed. It is fed by a single phase ac supply through a full converter. When speed is 500 rpm, firing angle is 45°. It is desired to raise the speed. It will be necessary to
decrease the firing angle
increase the firing angle
either decrease or increase the firing angle depending on the required speed
decrease the load torque
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
In Jone chopper, the commutating element
is a capacitor
is a capacitor and an inductor
is a capacitor and an auto transformer
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
A LASCR has
4 semiconductor layers and 3 junctions
3 semiconductor layers and 2 junctions
2 semiconductor layers and 2 junctions
any of these depending on the rating
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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