Physics
How does (a) resistance, and (b) specific resistance of a wire depend on it's (i) length, and (ii) radius?
Current Electricity
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Answer
(a) Dependency of resistance of a wire is as follows:
- Resistance of a wire is directly proportional to length of the wire.
- Resistance of a wire is inversely proportional to the square of radius of the wire.
(b) Dependency of specific resistance of a wire is as follows:
- Specific resistance of a wire does not depend on length of the wire as it is a characteristic property of the material of wire.
- Specific resistance of a wire does not depend on radius of the wire as it is a characteristic property of the material of wire.
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