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Q.

If the area of an electric conductor is reduced to its half, its resistance gets,


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a

Halved

b

Four times

c

Doubled

d

Tripled  

answer is C.

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Detailed Solution

If the area of an electric conductor is reduced to half, its resistance gets doubled.
Resistance is a conductor's characteristic that governs conduction in a conductor. Conduction decreases as resistance increases. In simple words, it can be defined as the opposition offered in the current flow in the circuit. The resistance (R) is given by
R=ρlA
Where ρ is the specific resistance of the conductor, l is the length of a conductor, and A is the area of the cross-section of a conductor.
From the relation, it can be observed that R is inversely proportional to A. Hence, when A is halved, R gets doubled.
 
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