Electronics and Communication Engineering - Power Electronics

11. 

In a series inverter

A. the commutating elements carry full load current
B. the commutating elements carry upto 50% of load current
C. the commutating elements do not carry load current
D. any of the above

Answer: Option A

Explanation:

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12. 

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: Option C

Explanation:

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13. 

Which of these devices is used in relaxation oscillator?

A. UJT
B. SCR
C. DIAC
D. TRIAC

Answer: Option A

Explanation:

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14. 

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: Option C

Explanation:

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15. 

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: Option B

Explanation:

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