Physics 914 MCQs [All-Courses]

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

Review Detailed Answer

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

Review Detailed Answer

Correct Answer: Further stimulation

The antiparticle of electron is: ______?

A Proton

B Meson

C Neutron

D Positron

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

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

Review Detailed Answer

Correct Answer: Inverted population

Compton’s effects was presented by: ________?

A Mosely

B Marley

C Arthur Holly Compton

D Stefan Boltzman

Review Detailed Answer

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

Review Detailed Answer

Correct Answer: Absorbed

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Physics 914 MCQs [All-Courses]

All Topics 914

All Topics 914

Earth’s orbital speed is __________?

Reflecting mirrors in laser is used to______________?

The antiparticle of electron is: ______?

In He-Ne laser the lasing action is produced by_______________?

A photon is always considered to be: ________?

The metastable state for an atom in laser light is_____________?

A black body emitting all the radiation in the visible region appears________.

In laser production the state in which more atoms are in the upper state than in the lower one is called_____________?

Compton’s effects was presented by: ________?

In normal state of energy the incident high energy photons will be______________?