Answer :


Resistance of the galvanometer coil, G = 12Ω

Current for full scale deflection = 3mA

For converting a galvanometer into a Voltmeter we can connect a resistance in series with the galvanometer. A minimum value of current should be allowed to flow through the voltmeter.

Required range of the voltmeter = 0 to 18 V

V = 18

Let the resistance needed = Rs


By plugging the values of V, G and Is in equation 1, we get,

Rs = 5988 Ω

For converting the galvanometer into a voltmeter of range 0-18 we can add a resistance of 5988Ω, is series with the galvanometer.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

(a) State the undPhysics - Board Papers

A multi range volPhysics - Exemplar

A multi-range curPhysics - Exemplar

A galvanometer coNCERT - Physics Part-I

A galvanometer coNCERT - Physics Part-I

Two moving coil mNCERT - Physics Part-I