Moving Charges And Magnetism Ques 82
82. The resistance of an ammeter is $13 $ $\Omega$ and its scale is graduated for a current upto $100$ amps. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto $750 $ amperes by this meter. The value of shunt-resistance is
[2007]
(a) $2 $ $\Omega$
(b) $0.2 $ $\Omega$
(c) $2 k $ $\Omega$
(d) $20 $ $\Omega$
Show Answer
Answer:
Correct Answer: 82.(a)
Solution:
- (a) We know
$ \begin{aligned} & \frac{I}{I_S}=1+\frac{G}{S} \\ & \frac{750}{100}=1+\frac{13}{S} \\ & S \Rightarrow 2 \Omega \end{aligned} $
BETA
