Physics MCQs Archives

Physics MCQs

Prepare effectively with our Physics MCQs with answers and explanations for exams and job tests. Our collection covers key topics such as mechanics, thermodynamics, optics, electricity and magnetism, modern physics, waves, and quantum theory. These multiple-choice questions are designed for students, competitive exam aspirants, and professionals preparing for NTS, PPSC, FPSC, CSS, PMS, university entry tests, and physics-related job assessments. Practice online to strengthen your concepts, improve problem-solving skills, and excel in exams with our updated Physics MCQs

121. A particle of mass m and charge Q moving with velocity V enters the region of a uniform magnetic field at right angle to the direction of its motion. How does its kinetic energy get affected?

A. Its kinetic energy will be affected

B. Its kinetic energy won’t be affected

C. It’s all energy won’t be affected

D. Its kinetic force won’t be affected

✅ The correct answer is option B.

122. How much heat does a 40 W bulb generates in one hour?

A. 144000J

B. 144J

C. 1.44J

D. 14J

✅ The correct answer is option A.

123. Two parallel wires carrying currents in the opposite directions

A. Repel each other

B. Attract each other

C. Have no effect upon each other

D. They cancel out their individual magnetic fields

✅ The correct answer is option A.

124. The practical illustration of the phenomenon of mutual induction is

A. A.C generator

B. D.C dynamo

C. Induction coil

D. Transformer

✅ The correct answer is option D.

125. A magnetic compass will be deflected if it is kept near a

A. Charge in motion

B. Charge at rest

C. Both

D. None

✅ The correct answer is option A.

126. Weber is the unit of

A. Magnetic field intensity

B. Magnetic induction

C. Magnetic flux

D. Self-inductance

✅ The correct answer is option C.

127. A magnetic field

A. Always exerts a force on a charged particle

B. Never exerts a force on a charged particles

C. Exerts a force if the charged particle is moving in the direction of the magnetic field lines

D. Exerts a force if the charged particle is moving perpendicular to the magnetic field lines

✅ The correct answer is option D.

128. Current produced by moving the loop of wire across a magnetic field is called

A. A.C current

B. D.C current

C. Induced current

D. Mean square current

✅ The correct answer is option C.

129. A moving coil galvanometer of resistance 100Ω gives half scale deflection for a current of 20mA. What will be the potential difference across it?

A. 4 volt

B. 5 volt

C. 2 volt

D. 0.4 volt

✅ The correct answer is option C.

130. Emf induced in a circuit according to Faraday’s law depends on the

A. Maximum magnetic flux

B. The rate of change of magnetic flux

C. Change in magnetic flux

D. Initial magnetic flux

✅ The correct answer is option B.