CBSE Class 10 Physics MCQs All Chapters Set 03

Practice MCQs for Class 10 Science All Chapters

Access targeted multiple-choice questions for All Chapters designed to align with the latest CBSE academic syllabus for Class 10 Science. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Access All Chapters Questions and Solutions

View or download the dedicated All Chapters MCQ resource below. Practicing these 50 objective questions regularly builds familiarity with standard exam patterns and helps secure higher marks in final Science evaluations.

Multiple Choice Questions

Question 1: The two ends of a rod of length L and uniform cross-sectional area A are kept at temperatures T₁ and T₂ (T₁ > T₂). The rate of heat transfer dQ/dt through the rod in the steady state is given by
(a) k(T₁ − T₂)/(LA)
(b) kLA(T₁ − T₂)
(c) kA(T₁ − T₂)/L
(d) kL(T₁ − T₂)/A
Show Answer & Explanation

Answer: (c) kA(T₁ − T₂)/L

Explanation:
1. Fourier's law: dQ/dt = kA(T₁ − T₂)/L.

Question 2: Ice is packed in saw dust because
(a) saw dust will not get melted easily.
(b) saw dust is poor conductor of heat.
(c) saw dust is a good conductor of heat.
(d) saw dust does not stick to the ice.
Show Answer & Explanation

Answer: (b) saw dust is poor conductor of heat.

Explanation:
1. Sawdust is a poor conductor of heat, so it keeps ice from melting quickly.

Question 3: The second best conductor of electricity after silver is
(a) Copper
(b) Gold
(c) Aluminium
(d) Iron
Show Answer & Explanation

Answer: (a) Copper

Explanation:
1. It is widely used in wires.

Question 4: 1 joule equals how many ergs?
(a) 10^7
(b) 10^5
(c) 10^3
(d) 10^9
Show Answer & Explanation

Answer: (a) 10^7

Explanation:
1. 1 J = 10^7 erg.

Question 5: One horse power is equal to
(a) 746 watts
(b) 1000 watts
(c) 500 watts
(d) 100 watts
Show Answer & Explanation

Answer: (a) 746 watts

Explanation:
1. 1 HP = 746 W.

Question 6: Noise is measured in
(a) Watt
(b) REM
(c) Centigrade
(d) Decibel
Show Answer & Explanation

Answer: (d) Decibel

Explanation:
1. Noise is measured in decibels.

Question 7: Which term is not associated with sound wave?
(a) Hertz
(b) Decibel
(c) Candela
(d) Mach
Show Answer & Explanation

Answer: (c) Candela

Explanation:
1. Candela is the unit of luminous intensity and is not associated with sound.

Question 8: Which of the following is neither a scalar nor a vector (a tensor)?
(a) Stress
(b) Speed
(c) Displacement
(d) Work
Show Answer & Explanation

Answer: (a) Stress

Explanation:
1. Stress and moment of inertia are tensor quantities.

Question 9: Moment of inertia and stress are examples of
(a) Tensor quantities
(b) Scalar quantities
(c) Vector quantities
(d) Dimensionless quantities
Show Answer & Explanation

Answer: (a) Tensor quantities

Explanation:
1. They are neither scalar nor vector.

Question 10: An odometer is a
(a) measuring instrument for distance covered by motor wheels
(b) measuring instrument for frequency of magnetic waves
(c) device for measuring sound intensity
(d) measuring instrument for electric power
Show Answer & Explanation

Answer: (a) measuring instrument for distance covered by motor wheels

Explanation:
1. An odometer records the distance travelled by a vehicle.

Question 11: A sudden fall in the barometer reading indicates
(a) a storm
(b) clear weather
(c) rain only
(d) hot weather
Show Answer & Explanation

Answer: (a) a storm

Explanation:
1. A rapid drop in pressure warns of a storm.

Question 12: Atmospheric pressure is measured by a
(a) barometer
(b) hygrometer
(c) thermometer
(d) anemometer
Show Answer & Explanation

Answer: (a) barometer

Explanation:
1. A barometer measures atmospheric pressure.

Question 13: An instrument used to measure humidity is:
(a) Anemometer
(b) Hygrometer
(c) Thermometer
(d) Pyrheliometer
Show Answer & Explanation

Answer: (b) Hygrometer

Explanation:
1. A hygrometer is used to measure humidity.

Question 14: A multimeter is used to measure
(a) current
(b) voltage
(c) resistance
(d) All of the above
Show Answer & Explanation

Answer: (d) All of the above

Explanation:
1. A multimeter measures current, voltage and resistance.

Question 15: Bolometer is used to measure
(a) Frequency
(b) Temperature
(c) Velocity
(d) Wavelength
Show Answer & Explanation

Answer: (b) Temperature

Explanation:
1. A bolometer is used to measure radiant heat (temperature).

Question 16: Atmospheric pressure is measured with a
(a) barometer
(b) hygrometer
(c) anemometer
(d) hydrometer
Show Answer & Explanation

Answer: (a) barometer

Explanation:
1. The barometer measures air pressure.

Question 17: The SI unit of energy is
(a) Joule
(b) Watt
(c) Newton
(d) Pascal
Show Answer & Explanation

Answer: (a) Joule

Explanation:
1. One joule equals one newton metre.

Question 18: The energy associated with motion is called
(a) Kinetic energy
(b) Potential energy
(c) Thermal energy
(d) Chemical energy
Show Answer & Explanation

Answer: (a) Kinetic energy

Explanation:
1. The energy of position is potential energy.

Question 19: The energy associated with position is called
(a) Potential energy
(b) Kinetic energy
(c) Thermal energy
(d) Sound energy
Show Answer & Explanation

Answer: (a) Potential energy

Explanation:
1. It is stored energy.

Question 20: The law of conservation of energy states that energy can
(a) Neither be created nor destroyed
(b) Be created
(c) Be destroyed
(d) Be doubled
Show Answer & Explanation

Answer: (a) Neither be created nor destroyed

Explanation:
1. It can only be converted from one form to another.

Question 21: Power is the rate of
(a) Doing work
(b) Change of force
(c) Change of velocity
(d) Change of momentum
Show Answer & Explanation

Answer: (a) Doing work

Explanation:
1. Its SI unit is watt.

Question 22: The weight of a body is equal to
(a) Mass times acceleration due to gravity
(b) Mass divided by g
(c) Mass only
(d) Volume times g
Show Answer & Explanation

Answer: (a) Mass times acceleration due to gravity

Explanation:
1. W equals mg.

Question 23: The value of g with altitude
(a) Decreases
(b) Increases
(c) Remains constant
(d) Becomes infinite
Show Answer & Explanation

Answer: (a) Decreases

Explanation:
1. It also decreases with depth.

Question 24: A geostationary satellite is placed above the
(a) Equator
(b) Tropic of Cancer
(c) North Pole
(d) Tropic of Capricorn
Show Answer & Explanation

Answer: (a) Equator

Explanation:
1. Its period is 24 hours.

Question 25: At high altitude water boils at a temperature
(a) Below 100 degrees C
(b) Above 100 degrees C
(c) At exactly 100 degrees C
(d) At 0 degrees C
Show Answer & Explanation

Answer: (a) Below 100 degrees C

Explanation:
1. Atmospheric pressure is lower.

Question 26: Archimedes' principle is related to
(a) Buoyancy
(b) Pressure
(c) Refraction
(d) Friction
Show Answer & Explanation

Answer: (a) Buoyancy

Explanation:
1. The loss in weight equals the weight of liquid displaced.

Question 27: A small iron ball sinks but a large iron ship floats because the ship
(a) Displaces water equal to its weight
(b) Is lighter
(c) Has higher density
(d) Is hollow only
Show Answer & Explanation

Answer: (a) Displaces water equal to its weight

Explanation:
1. It is the principle of floatation.

Question 28: When the temperature increases, the speed of sound
(a) Increases
(b) Decreases
(c) Remains constant
(d) Becomes zero
Show Answer & Explanation

Answer: (a) Increases

Explanation:
1. Speed of sound in air is about 332 m/s at 0 degrees C.

Question 29: The normal temperature of the human body in Fahrenheit is
(a) 98.6°F
(b) 96.8°F
(c) 100.4°F
(d) 37°F
Show Answer & Explanation

Answer: (a) 98.6°F

Explanation:
1. 37 °C = 98.6 °F.

Question 30: Latent heat is the heat required to change the phase of a substance
(a) without change in temperature
(b) with a rise in temperature
(c) with a fall in temperature
(d) at 0 °C only
Show Answer & Explanation

Answer: (a) without change in temperature

Explanation:
1. It is absorbed or released during phase change at constant temperature.

Question 31: Which mode of heat transfer can take place through vacuum?
(a) Radiation
(b) Conduction
(c) Convection
(d) All of these
Show Answer & Explanation

Answer: (a) Radiation

Explanation:
1. Radiation needs no medium.

Question 32: The conversion of a solid directly into vapour is called
(a) sublimation
(b) condensation
(c) evaporation
(d) fusion
Show Answer & Explanation

Answer: (a) sublimation

Explanation:
1. Iodine and dry ice sublime.

Question 33: The process opposite to sublimation, as in the formation of frost, is called
(a) hoar frost (deposition)
(b) fusion
(c) vaporisation
(d) condensation
Show Answer & Explanation

Answer: (a) hoar frost (deposition)

Explanation:
1. Frost forms when vapour turns directly to solid.

Question 34: Heat transfer in solids takes place mainly by
(a) conduction
(b) convection
(c) radiation
(d) evaporation
Show Answer & Explanation

Answer: (a) conduction

Explanation:
1. Heat passes through particles without their actual migration.

Question 35: Heat always flows from a body at
(a) Higher temperature to lower temperature
(b) Lower to higher temperature
(c) Equal temperature
(d) Higher mass to lower mass
Show Answer & Explanation

Answer: (a) Higher temperature to lower temperature

Explanation:
1. It is a form of energy.

Question 36: Heat transfer through solids without the actual movement of particles is called
(a) Conduction
(b) Convection
(c) Radiation
(d) Diffusion
Show Answer & Explanation

Answer: (a) Conduction

Explanation:
1. Metals are good conductors.

Question 37: Dry ice is solid
(a) Carbon dioxide
(b) Water
(c) Nitrogen
(d) Ammonia
Show Answer & Explanation

Answer: (a) Carbon dioxide

Explanation:
1. It sublimes directly to gas.

Question 38: In a transverse wave the particles of the medium vibrate
(a) perpendicular to the direction of wave travel
(b) parallel to the direction of wave travel
(c) in circles only
(d) not at all
Show Answer & Explanation

Answer: (a) perpendicular to the direction of wave travel

Explanation:
1. Transverse waves have crests and troughs.

Question 39: Which of the following does not need a medium to travel?
(a) Electromagnetic waves
(b) Sound waves
(c) Water waves
(d) Waves on a string
Show Answer & Explanation

Answer: (a) Electromagnetic waves

Explanation:
1. Light, radio waves and X-rays travel through vacuum.

Question 40: In a transverse wave, the vibrations of particles are
(a) Perpendicular to the direction of travel
(b) Parallel to the direction of travel
(c) Circular
(d) Random
Show Answer & Explanation

Answer: (a) Perpendicular to the direction of travel

Explanation:
1. It has crests and troughs.

Question 41: In a longitudinal wave, the vibrations of particles are
(a) Parallel to the direction of travel
(b) Perpendicular to the direction of travel
(c) Circular
(d) Random
Show Answer & Explanation

Answer: (a) Parallel to the direction of travel

Explanation:
1. It has compressions and rarefactions.

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All Chapters Objective Questions & Solutions for Class 10 Science

Class 10 Science All Chapters Objective Test Questions

Test your conceptual understanding of All Chapters with these targeted multiple-choice questions. Designed in alignment with the latest CBSE curriculum for Class 10 Science, these problem sets build accuracy and prepare students for objective exams.

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FAQs

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