JEE PYQ: Current Electricity Question 45
Question 45 - 2019 (09 Apr 2019 Shift 2)
The resistance of a galvanometer is 50 ohm and the maximum current which can be passed through it is 0.002 A. What resistance must be connected to it in order to convert it into an ammeter of range 0-0.5 A?
(1) 0.5 ohm
(2) 0.002 ohm
(3) 0.02 ohm
(4) 0.2 ohm
Show Answer
Answer: (4)
Solution
Using $I_g = I \frac{S}{S+G}$: $0.002 = 0.5 \frac{S}{S+50}$. $S = \frac{100}{498} \approx 0.2,\Omega$.
BETA
