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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 direction of the vector product is given by______________?

A Head to tail rule

B Right-hand rule

C Left-hand rule

D Triangular rule

Review Detailed Answer

Correct Answer: Right-hand rule

A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

A λ

B Speed of sound

C Speed of lightB.

D h

Review Detailed Answer

Correct Answer: Speed of lightB.

I ^. (j^ x k^) is equal to______________?

A 1

B i^

C j^

D k^

Review Detailed Answer

Correct Answer: 1

Which one of the following has the largest energy content ?

A 103 photons of wavelength 2 pm (γ-rays)

B 102 photons of wavelength 1nm (x-rays)

C 106 photons of wavelength 50?m (infrared)

D 106 photons of wavelength 200nm (UV)

Review Detailed Answer

Correct Answer: 103 photons of wavelength 2 pm (γ-rays)

If A=B, which of the following is not correct ?

A A.B = A^ B^

B |A| = |B|

C |A^| = |B^|

D AB^ = BA^

Review Detailed Answer

Correct Answer: A.B = A^ B^

A photon is________________?

A A unit of energy

B A positively charged particle

C A quantum of electromagnetic radiation

D A unit of wavelength

Review Detailed Answer

Correct Answer: A quantum of electromagnetic radiation

Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________?

A B is anti-parallel to A

B B is a negative vector of A

C B has a negative magnitude

D B is perpendicular to A

Review Detailed Answer

Correct Answer: B is a negative vector of A

Davison Germer experiment indicates__________________?

A Interference

B Polarization

C Electron diffraction

D Refraction

Review Detailed Answer

Correct Answer: Electron diffraction

Two vectors A and B are making angle θ with each other. The scalar projection of vector B on vector A is written as____________?

A A.B/A

B A.B/B

C A.cosθ

D Both a and b are correct

Review Detailed Answer

Correct Answer: A.B/A

In Compton scattering, the change in wavelength is maxed if_______________?

A The angle of scattering is 90°

B The angle of scattering is 60°

C The angle of scattering is 180°

D The angle of scattering is 0

Review Detailed Answer

Correct Answer: The angle of scattering is 180°

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Physics 914 MCQs [All-Courses]

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All Topics 914

The direction of the vector product is given by______________?

A transmitting station emits radio waves of wavelength λ at power P. If h is Planck’s constant & c the speed of light what is the rate of emission of photons ?

I ^. (j^ x k^) is equal to______________?

Which one of the following has the largest energy content ?

If A=B, which of the following is not correct ?

A photon is________________?

Two vectors are A = 3i^+2j^ -k^& B = 3i^-2j^ +k^ , then_____________?

Davison Germer experiment indicates__________________?

Two vectors A and B are making angle θ with each other. The scalar projection of vector B on vector A is written as____________?

In Compton scattering, the change in wavelength is maxed if_______________?