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.

In which quadrant, the only value of tan will be positive ?

A First

B Second

C Third

D Both 1st and 3rd

Review Detailed Answer

Correct Answer: Both 1st and 3rd

Select an alternative from of uncertainly principle from the following_______________?

A ∆E = h/m∆c(1-cosθ)

B ∆E . ∆t = h

C mc2 = hv

D Any of above

Review Detailed Answer

Correct Answer: ∆E . ∆t = h

The cross product of two vectors is a negative vector when______________?

A They are parallel vectors

B They are anti parallel vectors

C They are a perpendicular vector

D They are rotated through 270°

Review Detailed Answer

Correct Answer: They are rotated through 270°

The existence of Ether wind was experimentally rejected by__________________?

A equal to its rest mass

B double of its rest mass

C infinite

D zero

Review Detailed Answer

Correct Answer: infinite

The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?

A 2i^ – 2j^ + k^

B (2i^ – 2j^ +k^)/9

C (2i^ – 2j^ +k^)/3

D (2i^ – 2j^ +k^)/5

Review Detailed Answer

Correct Answer: (2i^ – 2j^ +k^)/3

Stopping potential for a metal surface in case of photoelectric emission depends on_____________?

A the threshold frequency for the metal surface

B the intensity of incident light

C the frequency of incident light and work function of the metal surface

D all of the above

Review Detailed Answer

Correct Answer: the frequency of incident light and work function of the metal surface

The cross product i^ x j^ is equal to_______________?

A Zero

B One

C i^

D k^

Review Detailed Answer

Correct Answer: k^

The linear momentum of an X-ray photon of wavelength 0.1A is_______________?

A 6.625x1023N-s

B 66.25x1023N-s

C 662.5x1023N-s

D data is insufficient

Review Detailed Answer

Correct Answer: 6.625x1023N-s

It is easier to turn a steering wheel with both hands than with a single hand because______________?

A Accelerating force increases on the wheel

B Two forces act on the wheel

C Two hands provide a firm grip

D The couple acts on the wheel

Review Detailed Answer

Correct Answer: The couple acts on the wheel

Linear momentum of a photon is_______________?

A zero

B hv/c2

C hv/c

D c2/hv

Review Detailed Answer

Correct Answer: zero

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Physics 914 MCQs [All-Courses]

All Topics 914

All Topics 914

In which quadrant, the only value of tan will be positive ?

Select an alternative from of uncertainly principle from the following_______________?

The cross product of two vectors is a negative vector when______________?

The existence of Ether wind was experimentally rejected by__________________?

The unit vector in the direction of vector A = 2 i^ -2j^ + k^ is_______________?

Stopping potential for a metal surface in case of photoelectric emission depends on_____________?

The cross product i^ x j^ is equal to_______________?

The linear momentum of an X-ray photon of wavelength 0.1A is_______________?

It is easier to turn a steering wheel with both hands than with a single hand because______________?

Linear momentum of a photon is_______________?