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On interchanging the resistances, the balance point of a meter bridge shifts to the left by 10 cm. The resistance of their series combination is 1 k Ω . How much was the resistance on the left slot before interchanging the resistances ?

1. 990 Ω
2. 505 Ω
3. 550 Ω
4. 910 Ω Students may find similar question in CP exercise sheet : [ JEE Main, Chapter : Current Electricity, Ex.1, Q.No.75]

Correct answer: 550 Ω

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