Question

.pls give full explanation
dont tell option only​

Answer 1

Answer:

not confirmed but i thinks its option 3

Answer 2

Answer:

Explanation:

Current through galvanometer

I= 3/(50+2950)=10power-3

Current for 30divisions= 10power-3A

Current for 20divi =10power-3/30*20

=2/3*10power-3

For the same deflection to obtain for 20divi let resistence added be R therefore

2/3*10power-3=3/(50+1R)

Or

R=4450ohm