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Physics 914 MCQs [All-Courses]

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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. 

All Topics  914

In the electron microscope, electric & magnetic fields are used as_______________?
A Electromagnetic gun
B Source of electromagnetic waves
C Deflecting charged particle
D Converging source of electrons
Correct Answer: Converging source of electrons
A body in equilibrium__________________?
A Always at rest
B Always in uniform motion
C May be at rest or in uniform motion
D May be at rest or in motion
Correct Answer: May be at rest or in uniform motion
In an electron microscope, we use energetic particles because of______________?
A Penetrating power is high
B Kinetic energy is large
C Wavelength is very short
D All the above reasons
Correct Answer: Wavelength is very short
Torque acting on a body determines_______________?
A Acceleration
B Linear acceleration
C Angular acceleration
D Direction of motion of the body
Correct Answer: Angular acceleration
If a diffraction grating is placed in the path of a light beam it reveals______________?
A Wave property
B Particle property
C Energy particle
D Electromagnetic wave property
Correct Answer: Wave property
SI unit of torque is______________?
A N.m
B joule
C Both a and b are correct
D Neither a nor b is correct
Correct Answer: N.m
In Davisson-Germer experiment the diffracted proton from crystal shows______________?
A Particle property
B Wave property
C Light property
D Quantum property
Correct Answer: Wave property
The dimension of torque is______________?
A [ML2T-2]
B [MLT-2]
C [ML2T]
D [ML-2T-2]
Correct Answer: [ML2T-2]
The velocity of a particle of mass m of de-Broglie wavelength λ is______________?
A v = 3 ×× 106 ms-1
B v = 2 ×× 10 ms-1
C v = 2 ×× 6 ms-1
D v = 2 ×× 106 ms-1
Correct Answer: v = 2 ×× 106 ms-1
Torque is defined as______________?
A Turning effect of force
B Cross product of position vector and force
C Product of force and moment arm
D All A, B and C are correct
Correct Answer: All A, B and C are correct
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