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.

X-ray are________________?

A of unknown nature

B high energy electrons

C high energy photons

D radio isotopes

Review Detailed Answer

Correct Answer: high energy photons

Which of the following radiations are suitable for the treatment of an infection in the interior of the body ?

A α-rays

B β-rays

C γ-rays

D X-rays

Review Detailed Answer

Correct Answer: γ-rays

Hydrogen atom does not emit X-rays because _________________?

A its energy levels are too close to each other

B its energy levels are too far apart

C it is too small in size

D it has a single electron

Review Detailed Answer

Correct Answer: it has a single electron

The path of alpha particle is_______________?

A Rectilinear

B Curved

C Zig-zag or erratic

D Elliptical

Review Detailed Answer

Correct Answer: Zig-zag or erratic

Excited atoms return to their ground state in_______________?

A 10-10s

B 10-8s

C 10-6s

D 10-9s

Review Detailed Answer

Correct Answer: 10-8s

During an encounter with an atom alpha particle knocks out ______________?

A Protons

B Electrons

C Neutrons

D Nothing

Review Detailed Answer

Correct Answer: Electrons

In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

A Balmer series

B Pfund series

C Bracket series

D Lymann series

Review Detailed Answer

Correct Answer: Lymann series

Pair production takes place in the vicinity of a heavy nucleus so that_____________?

A Net energy is conserved

B Net charge is conserved

C Net momentum is conserved

D All of the above

Review Detailed Answer

Correct Answer: All of the above

Ratio of the weight of H-atom to that of an electron is approximately______________?

A 18.336

B 1836

C 18360

D 183.6

Review Detailed Answer

Correct Answer: 1836

If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________?

A Fission reaction

B Fusion reaction

C Chain reaction

D Chemical reaction

Review Detailed Answer

Correct Answer: Chain reaction

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Physics 914 MCQs [All-Courses]

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All Topics 914

X-ray are________________?

Which of the following radiations are suitable for the treatment of an infection in the interior of the body ?

Hydrogen atom does not emit X-rays because _________________?

The path of alpha particle is_______________?

Excited atoms return to their ground state in_______________?

During an encounter with an atom alpha particle knocks out ______________?

In hydrogen spectrum which one of the following series lies in the ultraviolet region ?

Pair production takes place in the vicinity of a heavy nucleus so that_____________?

Ratio of the weight of H-atom to that of an electron is approximately______________?

If one or more of the neutrons emitted during fission cab be used to build up further fission then the reaction is self-sustained and is known as __________________?