Physics · 2016
JEE Main · 9 April 2016, Shift 1 · Q16
A 50 Ω resistance is connected to a battery of 5 V. A galvanometer of resistance 100 Ω is to be used as an ammeter to measure current through the…
A $\displaystyle 50 \Omega$ resistance is connected to a battery of $\displaystyle 5$ V. A galvanometer of resistance $\displaystyle 100 \Omega$ is to be used as an ammeter to measure current through the resistance, for this a resistance $\displaystyle r_s$ is connected to the galvanometer. Which of the following connections should be employed if the measured current is within $\displaystyle 1$% of the current without the ammeter in the circuit ?
Official answer
(1)
$\displaystyle r_s=0.5 \Omega$ in parallel with the galvanometer
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JEE Main 2016 Physics question, with the answer from NTA’s final answer key. Where our answers come from.