AP EAMCET Engineering 23 Apr 2019 Shift 1 Paper

The figure below shows the circuit diagram. From the circuit,
Ir = E - V

V

r

r=E−V
V[1+

r

R

]=E
V=

E

R+r

R
The general equation of a straight line passing through the origin is y = mx
Here, y=V,m=

E

R+r

and x=R
The line is passing through the origin and has a slope which reduces as R increases. So the graph is,