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Physics 914 MCQs [All-Courses]

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Physics is a core science subject that deals with the study of matter, energy, motion, force, heat, light, electricity, magnetism, and modern physics concepts. It plays a vital role in competitive exams such as PPSC, FPSC, NTS, OTS, KPPSC, BPSC, AJKPSC, CSS, and PMS, where questions test conceptual understanding, numerical problem-solving, and application of laws and formulas. 

All Topics  914

In a half-wave rectifier the r.m.s. value of the A.C. component of the wave is________________?
A Equal to D.C. value
B More than D.C. value
C Less than D.C. value
D Zero
Correct Answer: More than D.C. value
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
Correct Answer: 3
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
Correct Answer: Triode vacuum tube
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
Correct Answer: Reference voltage on the other
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
Correct Answer: A very high input impedance
The operation of a transistor requires______________?
A That the emitter be heated
B That the base be heated
C That the collector be heated
D None of the above
Correct Answer: None of the above
To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?
A 2
B 3
C 4
D 5
Correct Answer: 5
The operational amplifier is______________?
A A high gain amplifier
B A high-power amplifier
C A high resistance amplifier
D A low resistance amplifier
Correct Answer: A high gain amplifier
The alternating voltage is an example of_______________?
A A digital waveform
B An analogue waveform
C Discrete waveform
D None at all
Correct Answer: An analogue waveform
The specially designed semi-conductor diodes used as fast counters in electronic circuits are______________?
A The light emitting diodes
B Photo diodes
C Photo voltaic cell
D Solar cells.
Correct Answer: Photo diodes
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