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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 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
Correct Answer: slightly less than emitter current

Semi-conductors with donor atoms and free electrons belong to the type________________?

A n
B p
C mix
D any of above
Correct Answer: n

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.
Correct Answer: The light emitting diode

The device or circuit used for conversion of A.C. into D.C. is called_______________?

A An amplifier.
B A rectifier
C Filtering circuit
D Converter.
Correct Answer: A rectifier

The semiconductor diode can be used as a rectifier because _______________?

A It has low resistance to the current flow when forward biased & high resistance when reverse biased.
B It has low resistance to the current flow when forward biased.
C It has high resistance to the current flow when reverse biased
D Its conductivity increases with rise of temperature.
Correct Answer: It has low resistance to the current flow when forward biased & high resistance when reverse biased.

In the transistor schematic symbol, the arrow_______________?

A is located on the emitter
B is located on the base
C is locate on the collector
D points form north to south
Correct Answer: is located on the emitter

Thermions are________________?

A protons
B positrons
C electrons
D photons
Correct Answer: electrons

Which one of the following has the greatest energy gap ?

A insulator
B conductor
C semi conductor
D any of above
Correct Answer: insulator

The velocity of an oscillating charge as it moves to and fro along a wire is always_____________?

A constant
B zero
C changing
D infinite
Correct Answer: changing

Identify the correct statement about minority carriers_____________?

A holes in n-type and free electrons in p-type
B holes in n-type and p-type
C free electrons in n-type and holes in p-type
D free electrons in n-type and p-type
Correct Answer: holes in n-type and free electrons in p-type
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