Question

galvanometer of resistance 20 ohm gives a deflection of one division with pot. diff. 4mv cal. shunt if current of 10A is measured by it galvanometer 25 division​

Answer 1

Answer:

Here, I

g

=25×4×10

−4

A=10

−2

A

To convert the galvanometer into a voltmeter we must join a series resistance of

R=

I

g

V

−G

=

10

−2

25

−50=2500−50

=2450Ω