CBSE Class 7 Answered
How can we icrease the heat produced in a given wire or a heationg coil.
Asked by Abhinav | 17 Feb, 2017, 06:30: PM
Expert Answer
Hi,
The amount of heat produced in a wire depends on -
(1) Its material – better conductors produce less heat;
Example: Nichrome wire is used for electric appliances whereas connecting wires are made up of copper which is a better conductor so they do not get heated up as the element.
(2) Its length – as length increases heat produced increases.
Example: Elements are coiled in heaters to increase length .
(3) Thickness – as thickness increases heat produced decreases
Example: Lead wires of iron, heater etc. are thicker than normal connecting wire so that they don’t get heated up easily.
Answered by | 17 Feb, 2017, 06:49: PM
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