JEE Main 2013 Physics question
In a metre bridge experiment null point is obtained at 40 cm from one end of the wire when resistance X is balanced against another resistance Y. If X < Y, then the new position of the null point from the same end, if one decides to balance a resistance of 3X against Y, will be close to :
Answer: (3)
Solution
, so cm ≈ 67 cm, option (3).