A resistance of 2 Ω is connected across one gap of a metre-bridge (the length of the wire…
Physics · JEE Advanced · NTA Exams — Current Electricity
A resistance of 2 Ω is connected across one gap of a metre-bridge (the length of the wire is 100 cm) and an unknown resistance, greater than 2 Ω, is connected across the other gap. When these resistances are interchanged, the balance point shifts by 20 cm. Neglecting any corrections, the unknown resistance is
- 3 W
- 4 W
- 5 W
- 6 W.
Answer
(B) 4 W
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