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प्रश्न
Select good and bad conductors of heat from the following:
copper, mercury, wood, iron, air, saw-dust, cardboard, silver, plastic, wool.
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उत्तर
Good conductors — Mercury, copper, silver, iron.
Bad conductors — Wood, air, saw dust, plastic, wool, cardboard.
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संबंधित प्रश्न
Write true or false for a given statement.
Telephone wires are kept tight between the two poles in summer.
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The temperature of boiling water is _______
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Liquids expand _______ than the solids.
Name the instrument used to measure the temperature of a body.
What are the good and bad conductors of heat ? Give two examples of each.
Name a liquid which is a good conductor of heat.
Name a solid which is a good conductor of heat.
Why do we prefer to wear white or light coloured clothes in summer and black or dark coloured clothes in winter ?
The bottom of a cooking utensil is painted black. Give the reason.
Match the following
| 1. | Solid to liquid | a. | Condensation |
| 2. | Liquid to gas | b. | Deposition |
| 3. | Gas to solid | c. | Melting |
| 4. | Gas to liquid | d. | Vaporization |
