Question

A galvanometer of resistance 100 ohm and its scale has 30 divisions how do u convert it into a direct reading voltmeter if a current of 20ua produces a deflection of 20 divisions

Answer 1

Answer:

Solution :

The current required for full scale deflection

<br> (i) To convert it into ammeter, a shunt is required is parallel with it <br> Shunt resistance

<br> (ii) To convert galvanometer into voltmeter a high resistance in series with it is required <br> series resistance