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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.
Solids expand the least and gases expand the most on being heated.
Write true or false for a given statement.
Water is a bad conductor of heat.
The fig. shows a glass tumbler containing hot milk which is placed in a tub of cold water. State the direction in which heat will flow.
A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why ?
Why do we use cooking utensils made up of copper.
Why are quilts filled with fluffy cotton?
Why is a ventilator provided in a room?
Why are chimneys provided over furnace in factories?
Mention the factors affecting the flow of heat.
