Current Electricity 4 Question 19
19. A moving coil galvanometer of resistance $100 \Omega$ is used as an ammeter using a resistance $0.1 \Omega$. The maximum deflection current in the galvanometer is $100 \mu A$. Find the current in the circuit, so that the ammeter shows maximum deflection.
(2005, 2M)
(a) $100.1 mA$
(b) $1000.1 mA$
(c) $10.01 mA$
(d) $1.01 mA$
Show Answer
Solution:
- $V _{a b}=i _g \cdot G=\left(i-i _g\right) S$
$\Rightarrow \quad i=1+\frac{G}{S} i _g$
Substituting the values, we get
$$ i=100.1 mA $$
$\therefore$ Correct answer is (a).
