Question

A cell has an emf 1.5 v when connected across an external resistance of 2 ohm the terminal potential

Answer 1

will be same as 1.5V

Answer 2

Answer:

V=IR

1.2= I ×2

I= 1.2 /2

I= 3/5 A

Then ..

emf = I (R+r)

1.5 = 3/5 (2+r )

3r = 1.5

r=0.5ohm (ans)