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Take a broken cycle spoke or thin straight iron wire and paste a few pieces of wax at equal distance on it. Put one end of wire on table, put a brick or stone on it under the brick or stone as shown in fig. Heat the other end of wire with candle see what happens? which piece of wax falls down first?By heating one end of the wire, heat is transferred towards the cold end. This method of heat transfer is called conduction. The transfer of heat in solid objects occurs by conduction.1. What happens if other end of spoke or wire is heated by burning candle?2. Which piece of wax melts first and fell down?3. What is the transfer of heat in solids called? |
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Answer» 1. Wax pasted on wire starts melting. 2. The piece of wax close to burning candle falls first. 3. Transfer of heat in solids is called conduction. |
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