Current Electricity: JEE Main 2024 Physics question

JEE Main 2024 · 27 Jan, Evening shift · Q6524

JEE Main 202427 Jan, Evening shiftPhysicsHardCurrent Electricity150× since 2002

Wheatstone bridge principle is used to measure the specific resistance

\left(S_1\right)

of given wire, having length

L

, radius

r

. If

X

is the resistance of wire, then specific resistance is ;

S_1=X\left(\frac{\pi r^2}{L}\right)

. If the length of the wire gets doubled then the value of specific resistance will be :

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