Magnetic Effects of Current / करंट का चुंबकीय प्रभाव
JEE Main & Advanced
Physics
Magnetic Effects of Current / करंट का चुंबकीय प्रभाव
Question Bank
Self Evaluation Test - Moving Charges and Mangetism
question_answer
A milli voltmeter of 25 milli volt range is to be converted into an ammeter of 25 ampere range. The value (in ohm) of necessary shunt will be
A)0.001
B)0.01
C)1
D)0.05
Correct Answer:
A
Solution :
[a] Galvanometer is converted into ammeter, by connected a shunt, in parallel with it. \[\frac{GS}{G+S}=\frac{{{V}_{G}}}{I}=\frac{25\times {{10}^{{{L}_{3}}}}}{25}\] \[\frac{GS}{G+S}=0.001\Omega \] Here \[S<<G\] so \[S=0.001\Omega \]