A B is a wire of uniform resistance. The galvanometer G shows no current when the length AC =20 cm and CB = 80 cm . The resistance R is equal to

Question

A B is a wire of uniform resistance. The galvanometer G shows no current when the length AC =20 cm and CB = 80 cm . The resistance R is equal to (A) 2 Ω (B) 8 Ω (C) 20 Ω (D) 40 Ω

Tardigrade Admin · Accepted Answer

Using balanced condition, (R/80)=(A C/B C)=(20/80) ⇒ R=20 Ω

Q. $A B$ is a wire of uniform resistance. The galvanometer $G$ shows no current when the length $A C = 20 c m$ and $CB = 80 c m .$ The resistance $R$ is equal to

$2 Ω$

$8 Ω$

$20 Ω$

$40 Ω$

Using balanced condition,
$\frac{R}{80} = \frac{A C}{BC} = \frac{20}{80}$
$\Rightarrow R = 20 Ω$

Q. AB is a wire of uniform resistance. The galvanometer G shows no current when the length AC=20cm and CB=80cm. The resistance R is equal to

2Ω

8Ω

20Ω

40Ω