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State the factor which resistance of …

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State the factor which resistance of wire depand

Posted by Khadija Betma 6 years, 9 months ago

CBSE > Class 07 > Science

1 answers

Yogita Ingle 6 years, 9 months ago

The electrical resistance of a wire is greater for a longer wire and less for a wire of large cross sectional area. The resistance depends on
1. its length
2. its area of cross-section, and
3. the nature of its material.
The factor in the resistance, which takes into account the nature of the material, is the resistivity. Since it is temperature dependent, it can be used to calculate the resistance of a wire of given geometry at different temperatures.

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