Three copper wires of lengths and crosssectional areas are (l, A),(2 l, A / 2) and (l / 2,2 A) . Resistance is minimum in (1997)

Correct Answer is : wire of cross-sectional area 2A

wire of cross-sectional area 2 A

wire of cross-sectional area \frac{A}{2}

Class 12 NEET Physics Current Electricity Questions Part 1

Question : 71 of 100

Marks: +1, -0

Three copper wires of lengths and crosssectional areas are (l,A),(2l,

) and (

,2A). Resistance is minimum in

(1997)

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