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Standard VII
Physics
Conductor and Insulators
Question

Which of the following statement is true?
  1. Metals are bad conductors of heat
  2. In gases, heat is transferred by conduction
  3. In conduction, molecules move from hotter to colder parts transmitting energy
  4. Metals conduct heat better than the gases.

A
In conduction, molecules move from hotter to colder parts transmitting energy
B
Metals are bad conductors of heat
C
In gases, heat is transferred by conduction
D
Metals conduct heat better than the gases.
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Solution
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Metals conduct heat better than gases.
Order of conduction of heat
Solid > Liquid > Gas

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What is conductors and insulators ? Why solid conduct heat better than liquids and gases?
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During conduction, heat always flows from the hotter end to the colder end of an object.
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Q5
Q. Match the following:
Mode of Heat Transfer Mechanism
1. Conduction (a) Heat transfer occurs through electromagnetic waves without involving particles.
2. Convection (b) Transfer of heat through the movement of liquids and gases.
3. Radiation (c) Heat transfer takes place between objects by direct contact.

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