Question

The internal resistance of a 2.1 v cell which gives a current of 0.2A through a resistance of 10 ohm is

Answer 1

Explanation:

Determine the current drawn from a 12 V supply with internal resistance 0.5 Ω by the infinite network shown in figure. Each resistor has 1 Ω resistance.

Answer 2

Answer:

v=iR=0.2×10=2v

v=e-ir

2=2.1-0.2r

0.1=0.2r

r=0.1/0.2=0.5

hope it helps...