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प्रश्न
What are the good and bad conductors of heat ? Give two examples of each.
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उत्तर
Good conductors. “The substances through which heat is easily conducted are called good conductors of heat.”
Example : Copper, iron.
Bad conductors. “The substances through which heat is not conducted easily are called bad conductors of heat or poor conductors of heat.”
Example : Wood, cloth.
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संबंधित प्रश्न
Write true or false for a given statement.
Heat flows from a body at a high temperature to a body at a low temperature when they are kept in contact.
Write true or false for a given statement.
All solids expand by the same amount when heated to the same rise in temperature.
Write true or false for a given statement.
Water is a bad conductor of heat.
Fill in the blank
On heating a body, its temperature _______.
Fill in the blank
Liquids expand _______ than the solids.
Fill in the blank
Gases expand _______ than the liquids.
Fill in the blank
Metals are _______ of heat.
Select the correct alternative
Which of the statement is correct
One end of a steel girder in a bridge is not fixed, but is kept on roliers. Give the reason.
What are the land and sea breezes? Explain their formation.
