In the circuit shown in figure, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, the value of the resistor R will be

Question

In the circuit shown in figure, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, the value of the resistor R will be (A) 1000 Ω (B) 500 Ω (C) 100 Ω (D) 200 Ω

Tardigrade Admin · Accepted Answer

I × 500=12-2=10 V I =20 mA IR =2 ⇒ R =(2/20 × 10-3) =100 Ω

Q. In the circuit shown in figure, the galvanometer $G$ shows zero deflection. If the batteries $A$ and $B$ have negligible internal resistance, the value of the resistor $R$ will be

$1000 Ω$

$500 Ω$

$100 Ω$

$200 Ω$

$I \times 500 = 12 - 2 = 10 V$
$I = 20 m A$
$I R = 2 \Rightarrow R = \frac{2}{20 \times 1 0 ^{- 3}}$
$= 100 Ω$

Q. In the circuit shown in figure, the galvanometer G shows zero deflection. If the batteries A and B have negligible internal resistance, the value of the resistor R will be

1000Ω

500Ω

100Ω

200Ω