Explore topic-wise MCQs in Physics Mcqs.

This section includes 778 Mcqs, each offering curated multiple-choice questions to sharpen your Physics Mcqs knowledge and support exam preparation. Choose a topic below to get started.

751.

The current through a metallic conductor is due to the motion of _________________?
A. free electrons
B. protons
C. neutrons
D. still under controversy
Answer» B. protons
Discussion
752.

Laplace found that the alternate compressions and rarefactions produced in sound waves follows ________________?
A. isothermal law
B. adiabatic law
C. isochoric law
D. all of the above
Answer» C. isochoric law
Discussion
753.

Fundamental frequency of stationary waves in open pipe is ______________ times the frequency in closed pipe?
A. One
B. Two
C. Four time
D. None of these
Answer» C. Four time
Discussion
754.

Thermocouples convert___________________?
A. heat energy into electrical energy
B. heat energy into light energy
C. heat energy into mechanical energy
D. mechanical energy into heat energy
Answer» B. heat energy into light energy
Discussion
755.

Three equal resistors connected in series with a source of e m f together dissipate 10 W of power each. What will be the power dissipated if the same resistors are connected in parallel across the same source of e m f ?
A. 40 W
B. 90W
C. 100W
D. 120W
Answer» C. 100W
Discussion
756.

Beats are the results of____________________?
A. diffraction of sound waves
B. constructive and destructive interference
C. polarization
D. destructive interference
Answer» C. polarization
Discussion
757.

An immersion heater of 400 watts kept on for 5 hours will consume electrical power of __________________?
A. 2KWh
B. 20KWh
C. 6KWh
D. 12KWh
Answer» B. 20KWh
Discussion
758.

A simple pendulum has a bob of mass m and its frequency is f. If we replaced the bob with a heavier one say of 2m then that will be its new frequency ?
A. 1/4f
B. 1/2f
C. frequency lower than 20 Hz
D. 2f
Answer» D. 2f
Discussion
759.

The value of γ for diatomic gas is_______________?
A. 1.67
B. 1.4
C. γ = 1.3
D. None
Answer» C. γ = 1.3
Discussion
760.

The performance of a refrigerator is described by________________?
A. efficiency
B. coefficient of performance
C. both A and B
D. not described
Answer» C. both A and B
Discussion
761.

The dimension of elastic modulus is ___________________ ?
A. ML-1T-2
B. ML-2T-2
C. MLT-2
D. ML2T-2
Answer» B. ML-2T-2
Discussion
762.

In open organ pipe___________________?
A. only even harmonics are present
B. only odd harmonics are present
C. both even and odd harmonics are present
D. selected harmonics are present
Answer» D. selected harmonics are present
Discussion
763.

In which process entropy remains constant________________?
A. isobaric
B. isochoric
C. adiabatic
D. isothermal
Answer» D. isothermal
Discussion
764.

In which process all the heat supplied is converted into work done ?
A. isothermal
B. isochoric
C. isobaric
D. isentropic
Answer» B. isochoric
Discussion
765.

Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________?
A. volume
B. pressure
C. absolute temperature
D. time
Answer» D. time
Discussion
766.

If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________?
A. Boyles law
B. Charles law
C. Ideal gas law
D. Avagadros law
Answer» C. Ideal gas law
Discussion
767.

According to Pascals law the pressure of gas in a vessel is_____________?
A. Different in different direction
B. Same in all direction
C. Same only along opposite directions
D. Same only along normal directions
Answer» C. Same only along opposite directions
Discussion
768.

It is possible to distinguish between transverse and longitudinal waves form the property of __________________?
A. refraction
B. polarization
C. interference
D. diffraction
Answer» C. interference
Discussion
769.

When body is in motion, ____________ always changes?
A. its velocity
B. its acceleration
C. its position vector
D. its momentum
Answer» D. its momentum
Discussion
770.

Silence zone takes place due to____________________?
A. constructive interference
B. destructive interference
C. beats
D. resonance
Answer» C. beats
Discussion
771.

Mach number is used in connection with the speed of___________?
A. Ship
B. Light
C. Sound
D. aircraft
Answer» E.
Discussion
772.

Which of the following waves have smallest velocity in vacuum?
A. Ultraviolet
B. Sound
C. Infra-Red
D. Micro
Answer» C. Infra-Red
Discussion
773.

The mass-energy relation is the outcome of____________?
A. Quantum theory
B. General theory of relativity
C. Special theory of relativity
D. None of these
Answer» D. None of these
Discussion
774.

A man is in a car is moving with velocity of 36km/hr. His speed with repect to the car is ____________________?
A. 10m/s
B. 36m/s
C. zero
D. infinite
Answer» D. infinite
Discussion
775.

When collision between the bodies in a system is inelastic in nature then for system ____________________?
A. momentum changes but K.E remain conserve
B. K.E changes but momentum remain conserve
C. both momentum and K.E changes
D. both momentum and K.E remain conserve
Answer» C. both momentum and K.E changes
Discussion
776.

The physics of moving charge particles is known as__________?
A. Plasma physics
B. Electro-static’s
C. Electro-magnetic
D. Electro-dynamics
Answer» E.
Discussion
777.

The__________branch of Physics deals with nuclear particles such as neutrons, protons and nuclear?
A. Solid State Physics
B. Plasma Physics
C. structure is called
D. Nuclear Physics
E. Particle Physics
Answer» E. Particle Physics
Discussion
778.

The branch of physics which deals with the living things is called_________?
A. biological sciences
B. physical sciences
C. cell systems
D. elementary physics
Answer» B. physical sciences
Discussion