Tardigrade
Tardigrade - CET NEET JEE Exam App
Exams
Login
Signup
Tardigrade
Question
Physics
Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is
Question Error Report
Question is incomplete/wrong
Question not belongs to this Chapter
Answer is wrong
Solution is wrong
Answer & Solution is not matching
Spelling mistake
Image missing
Website not working properly
Other (not listed above)
Error description
Thank you for reporting, we will resolve it shortly
Back to Question
Thank you for reporting, we will resolve it shortly
Q. Current sensitivity of a moving coil galvanometer is $5 \,div/mA$ and its voltage sensitivity (angular deflection per unit voltage applied) is $20 \,div/V$. The resistance of the galvanometer is
NEET
NEET 2018
Moving Charges and Magnetism
A
$500 \, \Omega$
12%
B
$40 \, \Omega$
27%
C
$250 \, \Omega$
45%
D
$25 \, \Omega$
16%
Solution:
Current sensitivity
$I_S = \frac{NBA}{C}$
Voltage sensitivity
$V_S = \frac{NBA}{CR_G}$
So, resistance of galvanometer
$R_G = \frac{I_S}{V_S} = \frac{5 \times 1}{20 \times 10^{-3}} = \frac{5000}{20} = 250 \, \Omega $