Question

A galvanometer with a scale divided into 100 equal divisions has a current sensitivity of 10 divisions per
mA and a voltage sensitivity of 2 divisions per mV. What
adoptions are required to read (i) 5 A for full scale and
(ii) 1 division per volt ?​

Answer 1

Answer:

I

g

=(

10div

1mA

)(100div)=10mA

V

g

=(

2div

1mV

)(100div)=50mV

G=

I

g

V

g

=

10

50

=5Ω

I(current to be measured):-5A

n=

I

s

I

=

10mA

5A

=500

∴s=

n−1

G

=

500−1

5

=1×10

−2

Ω