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Standard VII
Physics
Conduction
Question

A) Heat transfer by conduction and convection require a material medium.
B) Heat transfer by radiation doesn't require a material medium.

  1. A is true but B is false
  2. B is true but A is false
  3. both A and B are false
  4. both A and B are true

A
both A and B are false
B
both A and B are true
C
B is true but A is false
D
A is true but B is false
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Solution
Verified by Toppr

Conduction and convection are processes where heat is transferred by the collision of molecules. Hence, for these processes to take place, we need a material medium.
In radiation, heat travels as electromagnetic waves which do not require a medium to travel. Its transfer mechanism is completely independent of the medium.

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Similar Questions
Q1
A) Heat transfer by conduction and convection require a material medium.
B) Heat transfer by radiation doesn't require a material medium.

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Q2
Which of the following statement(s) is/ are true about convection?
1. Convection requires a material medium for the transfer of heat.
2. In liquids, the predominant mode of heat transfer is convection.
3. In convection, heat flows from the cold end to the hot end of the substance.

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Q3
Which of the following statements is/are true with respect to conduction?
1. Conduction is a process in which particles move from the hot region to the cold region.
2. Conduction is a process in which paricles vibrate about their mean position to transfer energy.
3. Conduction does not require material medium for the transfer of energy.
4. Conduction is the prominent mode of heat transfer in solids.
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Q4
Which of these does not require a medium–conduction, convection or radiation?
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Q5
The primary mode of heat transfer in liquid is

(a) conduction
(b) liquid does not transfer heat
(c) radiation
(d) convection
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