Default Title

Question (1)

QN00311

Which mode of heat transfer does not require any medium?

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

Correct Answer: C

Explanation:

Radiation can transfer heat even through empty space.

Link:

Report Error

Question (2)

QN00312

Heat from the Sun reaches the Earth mainly through —

(A) conduction
(B) convection
(C) radiation
(D) diffusion

Correct Answer: C

Explanation:

Heat from the Sun travels through space by radiation.

Link:

Report Error

Question (3)

QN00313

Which statement correctly defines radiation?

(A) Heat transfer through actual movement of particles
(B) Heat transfer without any material medium
(C) Heat transfer only in solids
(D) Heat transfer by direct contact only

Correct Answer: B

Explanation:

Radiation does not require any medium.

Link:

Report Error

Question (4)

QN00314

A person sitting near a fire feels warm mainly because of —

(A) conduction
(B) convection
(C) radiation
(D) evaporation

Correct Answer: C

Explanation:

Heat reaches the person through radiation.

Link:

Report Error

Question (5)

QN00315

Which of the following is an example of radiation?

(A) Heating of water in a pan
(B) Smoke rising upward
(C) Sunlight warming the Earth
(D) Heating of a metal spoon in tea

Correct Answer: C

Explanation:

Sun’s heat reaches Earth through radiation.

Link:

Report Error

Question (6)

QN00316

Why do hot utensils cool down after being removed from the flame?

(A) They absorb cold air
(B) They lose heat through radiation
(C) They stop conducting heat
(D) Their particles stop moving

Correct Answer: B

Explanation:

Hot objects continuously radiate heat.

Link:

Report Error

Question (7)

QN00317

Which colour absorbs more heat radiation?

(A) White
(B) Silver
(C) Black
(D) Yellow

Correct Answer: C

Explanation:

Black surfaces absorb maximum heat radiation.

Link:

Report Error

Question (8)

QN00318

Light-coloured clothes are preferred during summer because they —

(A) absorb more heat
(B) reflect most heat
(C) produce cooling
(D) trap warm air

Correct Answer: B

Explanation:

Light colours reflect most heat radiation.

Link:

Report Error

Question (9)

QN00319

Dark-coloured clothes are preferred during winter because they —

(A) reflect heat quickly
(B) absorb more heat
(C) stop radiation completely
(D) produce heat energy

Correct Answer: B

Explanation:

Dark colours absorb more radiant heat.

Link:

Report Error

Question (10)

QN00320

Which surface reflects the maximum heat radiation?

(A) Black surface
(B) Rough dark surface
(C) White shiny surface
(D) Dull black surface

Correct Answer: C

Explanation:

White shiny surfaces are good reflectors.

Link:

Report Error

Question (1)

Which mode of heat transfer does not require any medium?

Explanation:

Link:

Question (2)

Heat from the Sun reaches the Earth mainly through —

Explanation:

Link:

Question (3)

Which statement correctly defines radiation?

Explanation:

Link:

Question (4)

A person sitting near a fire feels warm mainly because of —

Explanation:

Link:

Question (5)

Which of the following is an example of radiation?

Explanation:

Link:

Question (6)

Why do hot utensils cool down after being removed from the flame?

Explanation:

Link:

Question (7)

Which colour absorbs more heat radiation?

Explanation:

Link:

Question (8)

Light-coloured clothes are preferred during summer because they —

Explanation:

Link:

Question (9)

Dark-coloured clothes are preferred during winter because they —

Explanation:

Link:

Question (10)

Which surface reflects the maximum heat radiation?

Explanation:

Link:

Excel With Tutors

ExcelWithTutors

For Student

For Tutors

Learn

OUR POLICY