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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 function of collimeter in spectrometer is________________?
A to produce parallel beams of light
B to filter the light rays
C to make them
D no function
Correct Answer: to produce parallel beams of light
An alpha particle is emitted from 88Ra226. What is the mass and atomic number of the daughter nucleus ?
A 224 – 84
B 220 – 80
C 222 – 86
D 226 – 87
Correct Answer: 222 – 86
Errors in the transmission of power through optic fiber can be minimized by using a______________?
A Multimode index fiber
B Graded index fiber
C Single mode step index fiber
D Copper wire
Correct Answer: Graded index fiber
Sum of the masses of constituent nucleons as compared to the mass of the resultant nucleus is______________?
A Smaller
B Greater than 82
C Same
D Sometimes smaller some times greater
Correct Answer: Greater than 82
Magnification of the astronomical telescope is_____________?
A fo+fe
B fo/fe
C fe/fo
D (1+fo/fe)L/fo
Correct Answer: fo/fe
A mass spectrograph (spectrometer) sorts out____________?
A Molecules
B Ions
C Elements
D Isotopes
Correct Answer: Elements
In optic fiber transmission system _____________ are used regenerate the dim light signal?
A Diodes
B Repeaters
C Laser
D Transformer
Correct Answer: Repeaters
Nuclei having the same mass number but different atomic number are____________?
A Isotopes
B Isobars
C Isotones
D Isomers
Correct Answer: Isobars
The value of critical angle for glass is_______________?
A 42°
B 47°
C 52°
D 50°
Correct Answer: 42°
Mass of neutron is________________?
A 1.67 x 10-31 kg
B 1.67 x 10-27 kg
C 9.1 x 10-31 kg
D 1.67 x 10-19 kg
Correct Answer: 1.67 x 10-27 kg
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