1) Which among the following are regarded as three-pin voltage regulator ICs?
a. Fixed voltage regulators
b. Adjustable voltage regulators
c. Both a and b
d. None of the above
Answer
Explanation
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ANSWER: Both a and b
Explanation: No explanation is available for this question!
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2) Due to operation of series pass transistor in an active region of linear voltage regulator, ___________
a. The ripple contents in o/p voltage waveform is very low
b. Then there is no necessity of using high speed transitor
c. Both a and b
d. None of the above
Answer
Explanation
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ANSWER: Both a and b
Explanation: No explanation is available for this question!
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3) Which type of IC voltage regulator exhibits continuous variation in the impedance of transistor in order to supply the desired load current?
a. Linear regulators
b. Switching regulators
c. Both a and b
d. None of the above
Answer
Explanation
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ANSWER: Linear regulators
Explanation: No explanation is available for this question!
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4) In LM317 voltage regulator, what is the minimum value of voltage required between its input & output in order to supply power to an internal circuit?
a. 1V
b. 3V
c. 5V
d. 10V
Answer
Explanation
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ANSWER: 3V
Explanation: No explanation is available for this question!
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5) In LM317 voltage regulator, the protective diodes do not allow the filter capacitors to discharge through ______current points.
a. High
b. Low
c. Both a and b
d. None of the above
Answer
Explanation
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ANSWER: Low
Explanation: No explanation is available for this question!
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6) In a linear IC voltage regulator, series pass transistor always operates in ______ region.
a. Active
b. Saturation
c. Cut-off
d. All of the above
Answer
Explanation
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ANSWER: Active
Explanation: No explanation is available for this question!
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7) Switching regulators are series type regulators, which has ______ power dissipation & ______ efficiency.
a. increased, increased
b. increased, reduced
c. reduced, increased
d. reduced, reduced
Answer
Explanation
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ANSWER: reduced, increased
Explanation: No explanation is available for this question!
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8) The % load regulation of a power supply should be ideally ________ & practically _______.
a. zero, small
b. small, zero
c. zero, large
d. large, zero
Answer
Explanation
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ANSWER: zero, small
Explanation: No explanation is available for this question!
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9) Which performance parameter of a regulator is defined as the change in regulated load voltage due to variation in line voltage in a specified range at a constant load current?
a. Load regulation
b. Line regulation
c. Temperature stability factor
d. Ripple rejection
Answer
Explanation
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ANSWER: Line regulation
Explanation: No explanation is available for this question!
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10) Which among the following factors affect/s the output voltage of a regulated power supply?
a. Load current
b. Input voltage
c. Temperature
d. All of the above
Answer
Explanation
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ANSWER: All of the above
Explanation: No explanation is available for this question!
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