Physics · Science General

Heat Transfer Mechanisms

828 Questions

Heat Transfer Mechanisms deal with the movement of thermal energy through conduction, convection, and radiation. It involves practical applications like ocean heat storage and atmospheric heating. These fundamental physics concepts are frequently asked in general science sections.

Thermal conductionHeat convectionThermal radiationSpecific heatStates of matter

Heat Transfer Mechanisms Questions

Multiple choice physics heat and energy zeroth law of thermodynamics

Two bodies A and B are said to be in thermal equilibrium with each other, if :

  1. heat flows from A to B

  2. heat flows from B to A

  3. both the bodies lose equal amounts of heat to the atmosphere

  4. heat does not flow from either A or B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The correct answer is option(D).

Thermal equivalence happens when there is no temperature difference between two bodies. And no heat transfer happens.

Multiple choice physics heat and energy zeroth law of thermodynamics

Two bodies are in thermal equilibrium if they have same

  1. temperature

  2. amount of heat

  3. specific heat

  4. thermal capacity
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Thermal equilibrium means that there is no heat transfer going on between the bodies, which simply means that the bodies are at the same temperature. Heat content is a whole different concept - it is the amount of heat contained in a body, which is crucially dependent on mass. 

Multiple choice physics heat and energy zeroth law of thermodynamics

Two bodies A and B are said to be in thermal equilibrium with each other, if

  1. heat flows from A to B

  2. heat flows from B to A

  3. both the bodies lose equal amunts of heat to the atmosphere

  4. heat does not flow from either A or B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Two bodies A and B are said to be in thermal equilibrium with each other, ifheat does not flow from either A or B 

Multiple choice physics heat and energy zeroth law of thermodynamics

In thermal equilibrium concepts, heat lost by hot body is equal to

  1. Heat gained by hot body

  2. Heat gained by cold body

  3. Both (a) and (b)

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is very clear that heat flows from hot body to cold body under general conditions. 

So (B) is the correct option. 

Multiple choice physics heat and energy zeroth law of thermodynamics

Two bodies are said to be in the state of thermal equilibrium if there is no transfer of heat taking place between them. True or false.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Thermal equilibrium is said to be achieved when there is no exchange of heat in the system.
Hence, OPTION : A (true).
Multiple choice

What is the main energy transfer taking place when a gas fire burns?

  1. Chemical to light

  2. Chemical to thermal

  3. Fuel to sound

  4. Light to thermal
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When gas burns, the chemical energy stored in the fuel bonds is released as thermal energy (heat). While light is also produced, the primary purpose and main energy transfer in a gas fire is the conversion to heat.

Multiple choice

When heating up holiday leftovers in the microwave, what type of energy transformation occurs?

  1. thermal energy into electrical energy

  2. electromagnetic radiation into thermal energy

  3. electrical energy into electromagnetic radiation

  4. chemical energy into thermal energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Microwaves use electromagnetic radiation (microwaves) to excite water molecules in food, which increases their kinetic energy and manifests as thermal energy (heat).

Multiple choice

When potatoes are boiling to get softer for mashing, how does heat energy move?

  1. heat from the water transfers into the cold potatoes

  2. the cold from the potatoes transfers to the warm water

  3. heat from the water dissolved the cold potato molecules

  4. heat from the water evaporates cold potato molecules
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Heat energy naturally flows from an area of higher temperature to an area of lower temperature. Therefore, heat moves from the hot water into the cooler potatoes.