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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

When we excite some atoms by heat collision or electrical discharge they will________________?
A radiate electromagnetic energy with a continuous distribution of wavelength
B absorb particular wavelengths when white light is incident on them
C radiate electromagnetic energy of discrete characteristic wavelength
D emit either invisible or visible light
Correct Answer: radiate electromagnetic energy of discrete characteristic wavelength
T.V sets and microwave ovens emit ___________________?
A X-rays
B α-rays
C β-rays
D γ-rays
Correct Answer: X-rays
In obtaining an X-ray photograph of our hand we use the principle of______________?
A photo electric effect
B ionization
C shadow photograph
D any of above
Correct Answer: shadow photograph
Alpha particle ionizes an atom_________________?
A Through direct collision
B Through electrostatic attraction
C Through electrostatic repulsion
D All of above
Correct Answer: Through electrostatic repulsion
Photon of highest frequency will be absorbed when transition takes place from_____________?
A 1st to 5th orbit
B 2nd to 5th orbit
C 3rd to 5th orbit
D 4th to 5th orbit
Correct Answer: 1st to 5th orbit
The charge on alpha particles is________________?
A Plus one
B Plus two
C Minus two
D Minus one
Correct Answer: Plus two
The radiations emitted form hydrogen filled discharge tube show____________?
A band spectrum
B line spectrum
C continuous spectrum
D absorption spectrum
Correct Answer: line spectrum
Sterilization of surgical instruments medical supplies and bandages can be done by exposing them to a beam of_______________?
A α-rays
B β-rays
C γ-rays
D B and C have equal antiseptic propertie
Correct Answer: γ-rays
Total number of series in hydrogen spectrum is_____________?
A three
B four
C five
D six
Correct Answer: five
Various types of cancer are treated by_________________?
A Cobalt-60
B Strontium-90
C Carbon-14
D Nickel-63
Correct Answer: Cobalt-60
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