A resistance of 2Ω is connected across one gap of a meter bridge, the length of wire is 1 meter, and an unknown resistance,

A resistance of 2Ω is connected across one gap of a meter bridge, the length of wire is 1 meter, and an unknown resistance, greater than 2Ω is connected across the other gap. When these resistances are interchanged, the balance point shifts by 20 cm. Neglecting any correction, find the unknown resistance

(a) 3Ω

(b) 4Ω

(d) 6Ω

A resistance of 2Ω is connected across one gap of a meter bridge, the length of wire is 1 meter, and an unknown resistance,

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