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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.

The penetrating power of X-rays depends on their______________?

A applied voltage

B frequency

C source

D all of the above

Review Detailed Answer

Correct Answer: frequency

An alpha particle can produce fluorescence in__________________?

A ZnS

B Barium platinocyanide

C Calcium tungstate

D All of above

Review Detailed Answer

Correct Answer: All of above

Bracket series is obtained when all transition of electron terminate on_______________?

A 4th orbit

B 5th orbit

C 3rd orbit

D 2nd orbit

Review Detailed Answer

Correct Answer: 4th orbit

Geiger counter is suitable for _________________?

A Fast counting

B Extremely fast counting

C Slow counting

D All situations

Review Detailed Answer

Correct Answer: Slow counting

The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?

A Ke2/rn

B Ke2/rn2

C ÀKe2/rn

D ÀKe2/rn2

Review Detailed Answer

Correct Answer: Ke2/rn

The penetration power of alpha particle as compared to beta particle is_______________?

A 10 times more

B 100 times more

C 100 times less

D 10 times less

Review Detailed Answer

Correct Answer: 100 times more

Ground state energy of the 4th orbit in a H-atom is_____________?

A 13.60 eV

B 3.40 eV

C 0.85 eV

D 1.51 eV

Review Detailed Answer

Correct Answer: 0.85 eV

Strontium-90 is used as __________________?

A α-particle source

B β-particle source

C γ-rays source

D Neutron source

Review Detailed Answer

Correct Answer: α-particle source

Which one of following postulate is in accordance with the Rutherfords model ?

A continuous spectra for atoms

B discrete spectra for atoms

C either continuous nor discrete

D no spectrum

Review Detailed Answer

Correct Answer: continuous spectra for atoms

An alpha particle in a single encounter__________________?

A Loses a small fraction of its energy

B Losses most of its energy

C Loses no energy at all

D Loses all of its energy

Review Detailed Answer

Correct Answer: Losses most of its energy

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Physics 914 MCQs [All-Courses]

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All Topics 914

The penetrating power of X-rays depends on their______________?

An alpha particle can produce fluorescence in__________________?

Bracket series is obtained when all transition of electron terminate on_______________?

Geiger counter is suitable for _________________?

The electric P.E of an electron in an orbit at a distance rn from the positive charge_____________?

The penetration power of alpha particle as compared to beta particle is_______________?

Ground state energy of the 4th orbit in a H-atom is_____________?

Strontium-90 is used as __________________?

Which one of following postulate is in accordance with the Rutherfords model ?

An alpha particle in a single encounter__________________?