Computer Programming MCQs

5739 MCQs  (Page 105 of 574)

Attempt Computer Programming MCQs Quiz
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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If the anode current is 800 A, then the amount of current required to turn off the GTO is about____________?
A. 20 a
B. 200 a
C. 600 a
D. 400 a
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What is used to protect the SCR from over current ________________?
A. Cb and fuse.
B. Heat sink.
C. Snubber circuit.
D. Voltage clamping device.
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Under normal operating condition voltage clamping device offers impedance of_________?
A. High value.
B. Low value.
C. Zero value.
D. Moderate value.
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Which semiconductor device acts like a diode and two transistor?
A. Ujt
B. Diac
C. Triac
D. Scr
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Under over voltage condition impedance offered by the voltage clamping device is__________?
A. Low
B. High
C. Moderate
D. Infinity
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The latching current of GTO should be of order
A. 100 ma
B. 500 ma
C. 1 a
D. 2 a
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The maximum di/dt in a SCR is____________?
A. Directly proportional to supply voltage
B. Directly proportional to inductance in the circuit
C. Inversely proportional to supply voltage
D. Both a and b
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Example of a voltage clamping device______________?
A. Fast acting fuse
B. Snubber circuit
C. Metal oxide varistor
D. Aluminium block
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Switching frequency of SITH is____________?
A. 5 khz
B. 10 khz
C. 60 khz
D. 100 khz
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Word of the Day
16 Jul
Volatile
(of a substance) easily evaporated at normal temperatures.
بدلتے مزاج والا، کافور صفت

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