Physics MCQs

852 MCQs  (Page 8 of 86)

Attempt Physics Quiz
Non-inverting amplifier circuits have____________?
A. A very high input impedance
B. A very low input impedance
C. A low output impedance
D. None of the above
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An OP-AMP comparator is a circuit that compares the signal voltage on one of its inputs with a ______________?
A. Non-inverting voltage at output
B. Reference voltage on the other
C. Virtual input
D. Output
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The working of transistor as amplifier is similar to________________?
A. Step up transformer
B. Step down transformer
C. Three diodes in common
D. Triode vacuum tube
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To obtain a p-type semi-conductor Si Crystal must be doped with foreign atoms whose valency is_____________?
A. 2
B. 3
C. 4
D. 5
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The alternating voltage is an example of_______________?
A. A digital waveform
B. An analogue waveform
C. Discrete waveform
D. None at all
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The especially designed semiconductor diodes used as indicator lamps in electronic circuits are___________?
A. The switch
B. The light emitting diode
C. The photo diodes
D. Solar cells.
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Semi-conductors with donor atoms and free electrons belong to the type________________?
A. N
B. P
C. Mix
D. Any of above
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In p-n-p transistor the collector current is________________?
A. Equal to emitter current
B. Slightly less than emitter current
C. Greater than emitter current
D. Any of above
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The simplest type of rectification known as half wave rectification is obtained by____________________?
A. Using a transistor
B. Suppressing the harmonics in a.c voltage
C. Suppressing half wave of a.c supply by using diode
D. Using a coolidge tube
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Depletion region of a junction is formed_____________?
A. During the manufacturing process
B. Under forward bias
C. Under reverse bias
D. When temperature varies
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Word of the Day
23 Jul
Aisle
a passage between rows of seats in a building such as a church or theatre, an aircraft, or train.
طویل تنگ راستہ، نشتوں کے درمیان راستہ

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