In the given potentiometer circuit, length of the wire A B is 3 m and resistance is R=4.5 Ω. The length A C for no deflection in galvanometer is

Question

In the given potentiometer circuit, length of the wire A B is 3 m and resistance is R=4.5 Ω. The length A C for no deflection in galvanometer is (A) 2 m (B) 1.8 m (C) dependent on r1 (D) none of these

Tardigrade Admin · Accepted Answer

Potential gradient, x=((5/0.5+4.5))((4.5/3))=1.5 V m -1 Here (x)(A C)=3 ⇒ A C=(3/1.5)=2 m

Q. In the given potentiometer circuit, length of the wire $A B$ is $3 m$ and resistance is $R = 4.5 Ω$ . The length $A C$ for no deflection in galvanometer is

2 m

1.8 m

dependent on $r_{1}$

none of these

Potential gradient,
$x = (\frac{5}{0.5 + 4.5}) (\frac{4.5}{3}) = 1.5 V m^{- 1}$
Here $(x) (A C) = 3$
$\Rightarrow A C = \frac{3}{1.5} = 2 m$

Q. In the given potentiometer circuit, length of the wire AB is 3m and resistance is R=4.5Ω. The length AC for no deflection in galvanometer is

2 m

1.8 m

dependent on r1​

none of these

Potential gradient, x=(0.5+4.55​)(34.5​)=1.5Vm−1 Here (x)(AC)=3 ⇒AC=1.53​=2m

Q. In the given potentiometer circuit, length of the wire $A B$ is $3 m$ and resistance is $R = 4.5 Ω$ . The length $A C$ for no deflection in galvanometer is

dependent on $r_{1}$

Potential gradient,
$x = (\frac{5}{0.5 + 4.5}) (\frac{4.5}{3}) = 1.5 V m^{- 1}$
Here $(x) (A C) = 3$
$\Rightarrow A C = \frac{3}{1.5} = 2 m$