If the length and cross sectional area of a wire are doubled, its resistance will
If the length and cross sectional area of a wire are doubled, its resistance will
Aremain unchanged
Bbecome twice
Creduce to one half
Dincrease four times
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Correct answer is: remain unchanged
Explanation:
Wire’s cross section doubled means its cross section area is doubled.
\(\text{ Resistance} = \text{specific resistance} \times \frac{\text{length}}{\text{Area}}\)
Hence, if length and cross section area both doubled, resistance will remain same i.e inchanged.
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