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Modes of Heat Transfer — Homi Bhabha Class 6 Physics MCQs with Solutions
Free Homi Bhabha Class 6 Physics Modes of Heat Transfer MCQs with step-by-step solutions (10 questions). Part of Heat. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Modes of Heat Transfer · easy · theory
The three ways in which heat can travel from one place to another are:
A. melting, boiling and freezing
B. conduction, convection and radiation ✓ Correct
C. pushing, pulling and rubbing
D. reflection, refraction and radiation
Solution: Heat travels in three ways: conduction, convection and radiation.
Q2 — Modes of Heat Transfer · easy · theory
Metals such as iron and copper are:
A. good conductors of heat ✓ Correct
B. unable to carry heat
C. sources of cold
D. poor conductors of heat
Solution: Metals let heat pass through them easily, so they are good conductors of heat.
Q3 — Modes of Heat Transfer · easy · theory
A metal spoon kept in a cup of hot tea slowly becomes hot at the top end. Heat travels along the spoon by:
A. convection
B. radiation
C. reflection
D. conduction ✓ Correct
Solution: In a solid like a metal spoon, heat passes from the hot end to the cold end by conduction, without the spoon itself moving.
Q4 — Modes of Heat Transfer · easy · theory
The heat of the Sun reaches the Earth through empty space by:
A. burning
B. radiation ✓ Correct
C. convection
D. conduction
Solution: There is no air in space, so heat cannot travel by conduction or convection. It reaches us by radiation, which needs no medium.
Q5 — Modes of Heat Transfer · medium · theory
Materials like wood, plastic and rubber do not let heat pass through them easily. Such materials are called:
A. reflectors
B. radiators
C. conductors
D. insulators ✓ Correct
Solution: Poor conductors of heat, such as wood and plastic, are called insulators. They slow down the flow of heat.
Q6 — Modes of Heat Transfer · medium · theory
The handles of frying pans are often made of wood or plastic because these materials:
A. are very good conductors of heat
B. do not let heat pass easily, so the handle stays cool ✓ Correct
C. look colourful
D. are the cheapest materials
Solution: Wood and plastic are poor conductors (insulators), so heat does not reach your hand and the handle stays cool to hold.
Q7 — Modes of Heat Transfer · medium · theory
In liquids and gases, heat is carried by the actual movement of the warmed material. This way of heat transfer is called:
A. conduction
B. radiation
C. insulation
D. convection ✓ Correct
Solution: When a liquid or gas is heated, the warm part moves and carries heat with it. This is called convection.
Q8 — Modes of Heat Transfer · medium · theory
When water in a pan is heated from below, the hot water at the bottom:
A. stays at the bottom
B. rises up while cooler water sinks down ✓ Correct
C. turns solid
D. stops moving
Solution: Hot water is lighter, so it rises, and the cooler, heavier water sinks. These moving convection currents heat all the water.
Q9 — Modes of Heat Transfer · hard · theory
Which mode of heat transfer can take place even through empty space, without needing any material medium?
A. radiation ✓ Correct
B. conduction
C. convection
D. both conduction and convection
Solution: Conduction and convection need a material to travel through. Only radiation can pass through empty space, which is how the Sun warms us.
Q10 — Modes of Heat Transfer · hard · theory
During the day near a coast, cool air moves in from the sea towards the land (the sea breeze). This movement of air is an example of:
A. conduction
B. radiation
C. reflection
D. convection ✓ Correct
Solution: The warm air over the land rises and cooler air from the sea moves in to take its place. This flow of air is convection.