Current Electricity Ques 81
- 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
Answer:
Correct Answer: 81.(a)
Solution:
Formula:
- $V _{a b}=i _g \cdot G=\left(i-i _g\right) S$
$\Rightarrow \quad i=(1+\frac{G}{S}) i _g$
Substituting the values, we get
$ i=100.1 $ $mA $
$\therefore$ Correct answer is (a).
BETA
