Wire is made of the same material but has twice the diameter and half the length of wire

PHYSICS · Single correct · CBSE · Physics · Electricity · Electricity

Problem

47. Wire

Y

is made of the same material but has twice the diameter and half the length of wire

X

. If wire

X

has a resistance of

R

then wire Y would have a resistance of (A)

R / 8

(B)

R

(C)

2 R

(D)

8 R

Related theory

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