36. What is meant by the resistance of a conductor? Name and define its SI unit. List the factors
on which the resistance of a conductor depends. How is the resistance of a wire affected if
(a) Its length doubled?
(b) Its radius is doubled?
OR
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Explanation:
Resistance is the property of the conductor to resist the flow of current.
SI unit of Resistance is Ohm.
The resistance of current depends on Material of the wire, length and cross-section area of the wire and temperature.
Resistance of a wire is directly proportional to the length of a wire; so if the length is doubled, resistance is also doubled. ... Thus, if radius is doubled, area increases four times and hence the resistance becomes one-fourth.
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