In a metre bridge when... |JEE Main 2024| Current Electricity

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JEE MAIN 2024

01-02-2024 S2

Question

In a metre-bridge when a resistance in the left gap is 2Ω and unknown resistance in the right gap, the balance length is found to be 40 cm. On shunting the unknown resistance with 2Ω, the balance length changes by :

Select the correct option:

A

22.5 cm

B

20 cm

C

62.5 cm

D

65 cm

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