Electronics and Communication Engineering - Power Electronics
Exercise :: Power Electronics - Section 6
1. |
In a single phase full wave ac regulator feeding R-L load, the gate pulses |
A. |
are always of short duration | B. |
may be of short duration | C. |
should be rectangular with width (p - a) | D. |
cannot be rectangular with width (p - a) |
Answer: Option C
Explanation:
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2. |
In a semi converter feeding a resistive load, |
A. |
the waveshapes of input voltage and input current are always similar | B. |
the waveshapes of input voltage and input current can never be similar | C. |
the waveshapes of input voltage and input current are similar only if firing angle is zero | D. |
the waveshapes of input voltage and input current are similar only if firing angle is high |
Answer: Option C
Explanation:
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3. |
In a single phase semi-converter the number of thyristors is |
Answer: Option D
Explanation:
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4. |
A dc chopper is feeding an RLE load. The current can become discontinuous if |
A. |
is high | B. |
a is low | C. |
E is high | D. |
none of the above |
Answer: Option D
Explanation:
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5. |
Which of these commutation methods uses two leads? |
A. |
Class A | B. |
Class B | C. |
Class C | D. |
Class D |
Answer: Option D
Explanation:
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