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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

The device used for conversion of D.C. to A.C. is called______________?
A Converter
B A rectifier
C Inverter
D Oscillator
Correct Answer: Inverter
In half-wave rectification the output D.C. voltages is obtained across the load for_______________?
A The negative half cycle of A.C.
B The positive half cycle of A.C.
C The positive and negative half cycles
D Either positive or negative half of A.C.
Correct Answer: The positive half cycle of A.C.
In full wave rectification the output D.C. voltage across the load is obtained for_____________?
A The positive half cycle of input A.C.
B The negative half cycle of input A.C.
C The complete cycle of input A.C.
D All of the above.
Correct Answer: The complete cycle of input A.C.
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
Which one of the following is not a donor impurity ?
A antimony
B phosphorus
C aluminium
D arsenic
Correct Answer: aluminium
Forward current through a semi conductor diode circuit is due to____________?
A minority carriers
B majority carriers
C holes
D electron
Correct Answer: majority carriers
The value of resistivity for insulator is of the order of____________?
A 105 ohm metre
B 106 ohm metre
C 107 ohm metre
D 108 ohm metre
Correct Answer: 108 ohm metre
Which one of following band is completely filled in case of conductors ?
A Conduction band
B Fermi band
C Valence band
D Forbidden band
Correct Answer: Conduction band
Depletion region of a junction is formed_____________?
A during the manufacturing process
B under forward bias
C under reverse bias
D when temperature varies
Correct Answer: during the manufacturing process
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
Correct Answer: suppressing half wave of A.C supply by using diode
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