M C Q s D r i v e

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. 

Earth’s orbital speed is __________?
A 70 km/s
B 60 km/s
C 45 km/s
D 30 km/s
Correct Answer: 30 km/s
Reflecting mirrors in laser is used to______________?
A Further stimulation
B Lasing more
C For producing more energetic lasers
D All
Correct Answer: Further stimulation
The antiparticle of electron is: ______?
A Proton
B Meson
C Neutron
D Positron
Correct Answer: Positron
In He-Ne laser the lasing action is produced by_______________?
A Ne only
B He-Ne both
C Electrons of He
D Electrons Ne
Correct Answer: Ne only
A photon is always considered to be: ________?
A Moving with speed of light
B At rest
C In accelerated form
D Moving with speed of sound
Correct Answer: Moving with speed of light
The metastable state for an atom in laser light is_____________?
A 10-4 sec
B 10-5 sec
C 10-3 sec
D 10-8 sec
Correct Answer: 10-3 sec
A black body emitting all the radiation in the visible region appears________.
A Green
B White
C Blue
D Black
Correct Answer: White
In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?
A Metal stable state
B Normal state
C Inverted population
D All the above
Correct Answer: Inverted population
Compton’s effects was presented by: ________?
A Mosely
B Marley
C Arthur Holly Compton
D Stefan Boltzman
Correct Answer: Arthur Holly Compton
In normal state of energy the incident high energy photons will be______________?
A Stimulated
B Absorbed
C Cause X-ray emission
D Cause laser production
Correct Answer: Absorbed