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Current Electricity question

2024 · 1 Feb · Shift 2 · Q69

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JEE Main
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Current Electricity
2024 · 1 Feb · Shift 2 · Q69

Current Electricity question

2024 · 1 Feb · Shift 2 · Q69

JEE MainPhysicsCurrent ElectricityMCQ+4 / −1

In a metre-bridge when a resistance in the left gap is

2 \Omega

and unknown resistance in the right gap, the balance length is found to be

40 \mathrm{~cm}

. On shunting the unknown resistance with

2 \Omega

, the balance length changes by :

A
$62.5$
B
$22.5 \mathrm{~cm}$
C
$20 \mathrm{~cm}$
D
$65 \mathrm{~cm}$

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