In a meter bridge as shown in the figure, it is given that resistance Y = 12.5 Ω and that the balance is obtained at a distance 39 . 5 cm from end A (by jockey J ). After interchanging the resistances

Question

In a meter bridge as shown in the figure, it is given that resistance $Y = 12.5 Ω$ and that the balance is obtained at a distance $39.5 cm$ from end $A$ (by jockey $J$ ). After interchanging the resistances $X$ and $Y$ a new balance point is found at a distance $l_{2}$ from end $A$ . What are the values of $X$ (in $Ω$ ) and $l_{2}$ ?

TestHub · Accepted Answer

For a balanced meter bridge, ( y )×​ 39.5 = x × 100 - 39.5 , x = 12.5 × 39.5 60.5 = 8.16 Ω . When x and y are interchanged l 1 and ( 100 − l 1 ) will also interchange, l 2 = 60. 5 cm .

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