question_answer 26)

A galvanometer coil has a resistance of and the meter shows full scale deflection for a current of 3 mA. How will you convert the meter into a voltmeter of range 0 to 18 V?

Answer:

Here                 Galvanometer resistance,                 The galvanometer can be converted into the voltmeter of range 0 to V (here V = 18 V) by connected a high series resistance R given by