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Question

What are the factors upon which the amount of heat produced in a wire depend?
(i) Material
(ii) Length
(iii) Thickness
  1. Only (i) and (ii)
  2. Only (i) and (iii)
  3. (i), (ii) and (iii)
  4. Only (ii) and (iii)


Solution

The correct option is C (i), (ii) and (iii)
The amount of heat produced in a wire depends upon:
(i) Material of the wire
(ii) Length of the wire
(iii) Thickness of the wire
The above factors are decided for electrical components depending upon their application. For example, fuse wire has low melting point and is thin. Coils used in heating applications are thick and have high melting points.

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