MCQs with Solutions for all Competitive Examinations

Physics MCQs for Competitive Examination

Q. 1
Which of the following physical quantities is a scalar quantity?

(A) Weight
(B) Impulse
(C) Young’s Modulus
(D) Acceleration

Answer: (C) Young’s Modulus

Q. 2
Rate of change of momentum is

(A) Area
(B) Pressure
(C) Force
(D) Velocity

Answer: (C) Force

Q. 3
Who discovered the Theory of Relativity?

(A) Albert Einstein
(B) Issac Newton
(C) Michael Faraday
(D) Niels Bohr

Answer: (A) Albert Einstein

Q. 4
Which device is used to measure the depth of the ocean?

(A) Lexometer
(B) Nanometer
(C) Hydrometer
(D) Fathometer

Answer: (D) Fathometer

Q. 5
What is the unit of electric resistance? 

(A) Joule
(B) Dynes
(C) Pascal
(D) Ohm

Answer: (C) Ohm

Q. 6
Which of the following is not a vector quantity?

(A) Work
(B) Displacement
(C) Force
(D) Velocity

Answer: (A) Work

Q. 7
What is the unit of relative density?

(A) Kg/m
(B) Kg/m²
(C) Kg/m³
(D) No unti

Answer: (C) Kg/m³

Q. 8
Light travels fastest in

(A) Nitrogen
(B) Air
(C) Vacuum
(D) Steel

Answer: (C) Vacuum

Q. 9
Impulse is equal to

(A) Change in momentum
(B) Change in force
(C) Change in velocity
(D) Change in acceleration

Answer: (A) Change in momentum

Q. 10
Acceleration is

(A) Inversely proportional to force
(B) Inversely proportional to mass
(C) Directly proportional to force
(D) Directly proportional to mass

Answer: (C) Directly proportional to force

Q. 11
Which of the following statement about displacement is false?

(A) It can be positive, negative or zero
(B) Displacement is never greater than Distance
(C) Its SI unit is meter
(D) It is always positive

Answer: (D) It is always positive

Q. 12
Which physical quantity is measured in “Siemens”?

(A) Electric potential
(B) Electrical conductance
(C) Magnetic flux
(D) Refractive index

Answer: (B) Electrical conductance

Q. 13
If a body slides over a surface, the force resisting the motion between them is called

(A) Friction
(B) Centripetal force
(C) Inertia
(D) Centrifugal force

Answer: (A) Friction

Q. 14
What is the SI unit of force?

(A) Pascal
(B) Boyle
(C) Newton
(D) Watt

Answer: (C) Newton

Q. 15
Which device is used to convert the Alternating Current into Direct Current?

(A) Ammeter
(B) Galvanometer
(C) Rectifier
(D) Transformer

Answer: (C) Rectifier

Q. 16
The washing machine works on the principle of 

(A) Dialysis
(B) Diffusion
(C) Reverse Osmosis
(D) Centrifugation

Answer: (D) Centrifugation

Q. 17
Energy travels from the Sun to the Earth through

(A) Conduction
(B) Convection
(C) Radiation
(D) Modulation

Answer: (C) Radiation

Q. 18
The material used in Electric Heater is

(A) Tungsten
(B) Nichrome
(C) Brass
(D) Steel

Answer: (B) Nichrome

Q. 19
Anemometer is an instrument used to measure

(A) Velocity
(B) Wind direction
(C) Wind speed
(D) Temperature

Answer: (C) Wind speed

Q. 20
The unit of measure of noise is

(A) Decibel
(B) Hertz
(C) Amplifier
(D) Accoustics

Answer: (A) Decibel

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