Question

2. Three metallic wires have lengths and
cross-sectional areas as (L, A): 2L, and
2
(62
24
.The resistance will be minimum in:
(a) wire of cross-sectional area A/2
(b) wire of cross-sectional area A
(c) wire of cross-sectional area 2 A
(d) same in all the three cases​

Answer 1

Answer:

option c

Explanation:

We know that , R∝1/A;

So, the resistance of the wire will be minimum when the area of cross-section is maximum and length is minimum.the wire of cross-sectional area have maximum area and minimum length hence it will have minimum resistance out of all other combination.

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