When a galvanometer having 30 divisions scale and `100Omega` resistance is connected in series with the battery of e.m.f. 3 volt through a resistance of `200Omega`, it shows full scale deflection. Find the figure of merit of the galvanometer in microampere.

Explanation

To find the figure of merit of the galvanometer in microamperes, we will follow these steps:

### Step 1: Identify Given Values
We have the following values from the problem:
- Number of divisions on the galvanometer scale, \( n = 30 \)
- Resistance of the galvanometer, \( R_g = 100 \, \Omega \)
- External resistance, \( R = 200 \, \Omega \)
- EMF of the battery, \( E = 3 \, \text{V} \)
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