Question

A wire of given material having length l and area of cross-section A has a resistance of 8 ohm. What would be the resistance of the same material having length l/4 and area cross-section 2A?

Answer 1

Answer:

Resistance = 1 ohm

Explanation:

R1 = ρl/A = 8 ohm ( given) --> ( i )

R2 = ρl/4 /2A = (1/8) *( ρl/A)

R2 = 8/8 [ From i ]

R2 = 1 ohm