Question

The internal connections of a moving coil galvanometer is given in the fig (i) and fig (ii)

1. What is the use of moving coil galvanometer?

2. Which figure(i) or figure(ii) is used to measure Voltage?

3. Write an expression for resistance required to convert the moving coil galvanometer in to voltmeter.

4. If a very small resistance (eg, copper wire) is used to convert moving coil galvanometer in to voltmeter, will it work properly?

Answer 1

1. Moving coil galvanometer is used to detect the presence of current 

2. The instrument shown in figure (2) is used to measure voltage. 

3. Resistance is connected in series with galvanometer. R = \(\frac{V}{I_g}-G\)

4. No, A high resistance is required to convert galvanometer in to voltmeter.