Q. A milli voltmeter of 25 milli volt range is to be converted into an ammeter to 25 ampere range. The value (in ohm) of necessary shunt will be
A) 0.001
B) 0.01
C) 1
D) 0.05
Explanation
(a) [image:3_image155.emf]
$\frac{GS}{G + S} = \frac{V_{G}}{I} = \frac{25 \times 10^{- 3}}{25}$
$\frac{GS}{G + S} = 0.001\Omega$
Here $S < < G$ So
$S = 0.001\ \Omega$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.