Question

23. Why are wires of different materials and different lengths and thicknesses used? class7

Answer 1

Answer:

because wire is used in many places of electricity things the length of different wire because when the wire is attached to pole the length is required the thickness is important when the wind flow speed then the thin wire break then the wire spread electricity anywhere that is why the thickness is important.

Answer 2

Answer:

after connecting to the electric supply, their elements become red hot and give out heat. The amount of heat produced in a wire depends on its material, length and thickness. Thus, for different requirements, the wires of different materials and different lengths and thicknesses are used.

Explanation:

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