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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Current Electricity
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A resistance of 2Ω is connected across one gap of a meter-bridge and an unknown resistance, greater than 2Ω, is connected across the other gap. When these resistances are interchanged, the balance point shifts by 20cm. The unknown resistance is

(A)3Ω(B)4Ω(C)5Ω(D)6Ω

 

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