In a meter bridge experiment, the ratio of the left gap resistance to right gap resistance is 2:3, the balance point from left is

Question

In a meter bridge experiment, the ratio of the left gap resistance to right gap resistance is 2:3, the balance point from left is (A) 60 cm (B) 50 cm (C) 40 cm (D) 20 cm

Tardigrade Admin · Accepted Answer

In a meter bridge (R1/R2)=(l/100-l) (2/3)=(l/(100-l)) ⇒ 200-2 l=3 l ⇒ 5 l=200 ∴ l=40 cm

Q. In a meter bridge experiment, the ratio of the left gap resistance to right gap resistance is $2 : 3,$ the balance point from left is

60 cm

50 cm

40 cm

20 cm

In a meter bridge
$\frac{R _{1}}{R _{2}} = \frac{l}{100 - l}$
$\frac{2}{3} = \frac{l}{( 100 - l )}$
$\Rightarrow 200 - 2 l = 3 l$
$\Rightarrow 5 l = 200$
$∴ l = 40 c m$

Q. In a meter bridge experiment, the ratio of the left gap resistance to right gap resistance is 2:3, the balance point from left is