1) In ac - dc conversion, when the switch is closed then the sum of voltages around the loop is
a. Zero
b. Non zero
c. Equal to the sum of voltage when switch is open
d. Twice of the voltage when switch is open
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Answer
Explanation
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ANSWER: Non zero
Explanation:
No explanation is available for this question!
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2) The switching function of semiconductor devices can be characterized with
a. Duty ratio only
b. Frequency only
c. Duty ratio and frequency
d. Duty ratio, frequency and time delay
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Answer
Explanation
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ANSWER: Duty ratio, frequency and time delay
Explanation:
No explanation is available for this question!
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3) The quadrant operation of BJT is represented by
a. 1
b. 2
c. 3
d. 4
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Answer
Explanation
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ANSWER: 2
Explanation:
No explanation is available for this question!
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4) TRIAC is a semiconductor power electronic device which contains
a. Two SCR’s connected in reverse parallel
b. Two SCR’s connected in parallel
c. Two SCR’s connected in series
d. Two BJT’s connected in series
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Answer
Explanation
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ANSWER: Two SCR’s connected in reverse parallel
Explanation:
No explanation is available for this question!
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5) Silicon controlled rectifier can be turned on
a. By applying a gate pulse and turned off only when current becomes zero
b. And turned off by applying gate pulse
c. By applying a gate pulse and turned off by removing the gate pulse
d. By making current non zero and turned off by making current zero
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Answer
Explanation
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ANSWER: By applying a gate pulse and turned off only when current becomes zero
Explanation:
No explanation is available for this question!
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6) Bidirectional semiconductor device is
a. Diode
b. BJT
c. SCR
d. TRIAC
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Answer
Explanation
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ANSWER: TRIAC
Explanation:
No explanation is available for this question!
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7) An ideal diode is
a. Unidirectional
b. Bidirectional
c. Fixed voltage polarity
d. Only (a) and (c)
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Answer
Explanation
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ANSWER: Only (a) and (c)
Explanation:
No explanation is available for this question!
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8) IGBT stands for
a. Insulated gate bipolar transistor
b. Insulated gate bidirectional transistor
c. Inductive gate bipolar transistor
d. Inductive gate bidirectional transistor
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Answer
Explanation
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ANSWER: Insulated gate bipolar transistor
Explanation:
No explanation is available for this question!
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9) An ideal switch is
a. Lossless
b. Carry current in any direction when it is on
c. Does not carry any current in any direction when it is off
d. All of these
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Answer
Explanation
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ANSWER: All of these
Explanation:
No explanation is available for this question!
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10) A rectifier with an external low pass filter is an example of
a. Indirect switch matrix circuits
b. Direct switch matrix circuits
c. Embedded converters
d. All of these
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Answer
Explanation
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ANSWER: Direct switch matrix circuits
Explanation:
No explanation is available for this question!
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