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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.
A mercury thermometer makes use of the property of the expansion of liquids on heating.
Fill in the blank
Liquids expand _______ than the solids.
Iron rims are heated before they are fixed on the wooden wheels. Explain the reason.
Describe one experiment to show that liquids expand on heating.
State which expands more, when heated to the same temperature : solid, liquid or gas ?
Why is a tea kettle provided with an ebonite handle?
Why are quilts filled with fluffy cotton?
Why do we prefer to wear white or light coloured clothes in summer and black or dark coloured clothes in winter ?
Mention the factors affecting the flow of heat.
Explain the following effects of heat.
Expansion
