Jee Main 2024 01 02 2024 Shift 1 - Question10
Question 10
A moving coil galvanometer has resistance $50 \Omega$ and full deflection current is $5 mA$. The resistance needed to convert this galvanometer into voltmeter of range 100 volt is
(1) $19550 \Omega$
(2) $18500 \Omega$
(3) $19850 \Omega$
(4) $18760 \Omega$
Show Answer
Answer: (1)
Solution:
$\lg (G+R)=100 V$
$5 \times 10^{-3}(50+R)=100^{20}$
$50+R=20000$
$R=19550 \Omega$
BETA
