A 50 $\Omega $ resistance is connected to a battery of 5 V. A galvanometer of resistance 100 $\Omega $ is to be used as an ammeter to measure current through the resistance, for this a resistance rs is connected to the galvanometer. Which of the following connections should be employed if the measured current is within 1% of thecurrent without the ammeter in the circuit ?

Question

A 50 $\Omega $ resistance is connected to a battery of 5 V. A galvanometer of resistance 100 $\Omega $ is to be used as an ammeter to measure current through the resistance, for this a resistance r_s is connected to the galvanometer. Which of the following connections should be employed if the measured current is within 1% of thecurrent without the ammeter in the circuit ?

r_s = 0.5 $\Omega $ in parallel with the galvanometer

r_s = 0.5 $\Omega $ in series with the galvanometer

r_s = 1 $\Omega $ in series with galvanometer

r_s =1 $\Omega $ in parallel with galvanometer

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