Question

a
circuit with power supply
of emf 10V
and internal resistance
3 ohms. The current through corcuit
is 2 A. What is value of R​

Answer 1

Explanation:

I = E / ( R + r)

= 10 / ( R + 3)

2 = 10 / ( R + r)

2R + 2x 3 = 10

2R = 10 - 6 = 4

R = 2 ohm