In the half-deflection method, a galvanometer is joined in series with a cell of 3.0 V and a…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
In the half-deflection method, a galvanometer is joined in series with a cell of V and a resistance box of . The deflection is divisions, which is the full scale. A shunt of across the galvanometer makes the deflection divisions. Find the resistance of the galvanometer, the current for full deflection, and the figure of merit, the current per division.
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The worked solution
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Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. The resistance. .
Step 2. The full-scale current. .
Step 3. The figure of merit. per division.
Answer: , A and A per division.
Check. is a little larger than . The relative difference is , small, because is much larger than .
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