Modern Physics> If a length of a cylindrical conductor in...

If a length of a cylindrical conductor increased by 20% keeping the volume constant.then percentage change in resistance of the conductor is 11×n% the value of n

Sailaja , 6 Years ago

Grade 12

1 Answers

Arun

Last Activity: 6 Years ago

Dear student

as volume is constant

V1 = V2

A1 * L1 = A2 * L2

L2 / L1 = A 1 / A2 = 1.02

Now

R = rho * L /A

hence

R1 / R2 = L1 *A2/ L2 *A1

R1 / R2 = 1 / 1.02^2

R1 / R2 = 1 / 1.0404

R2 = 1.0404R1

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Modern Physics> If a length of a cylindrical conductor in...

If a length of a cylindrical conductor increased by 20% keeping the volume constant.then percentage change in resistance of the conductor is 11×n% the value of n

Sailaja , 6 Years ago

Arun

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