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Name three factors on which the resistance of a wire depends and state how it is affected by the factors stated by you?
Name three factors on which the resistance of a wire depends and state how it is affected by the factors stated by you?
Class 10 | Current Energy | ICSE | Physics | Selina
Name three factors on which the resistance of a wire depends and state how it is affected by the factors stated by you?

The following are the three variables that influence wire resistance:

(i)A wire’s resistance is proportionate to its length, that is,

R ∝ l

(ii) A wire’s resistance varies inversely with its cross sectional area. When the wire’s cross section area is larger, the resistance is lower, and vice versa.

R ∝ 1 / a

(iii) As the temperature of a conductor rises, so does its resistance. As a result, there is an increase in the number of accidents.

(iv) Because various substances have varying concentrations of free electrons, resistance is determined by the composition of the conductor. Substances with a high concentration of electrons have less resistance and are hence referred to as excellent.

i

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