Question

Calculate the value of the resistance R in the circuit shown in the figure so that the current in the circuit is 0.2 A. What would be the potential difference between points A and D?

Answer 1

Answer: This may help you

Explanation:

The equivalent resistance for arm BCD is R

1

​

=5+10=15Ω

The equivalent resistance for the arm BE is R

2

​

=(1/30+1/10+1/15)

−1

=5

The potential between points B and E is V

BE

​

=IR

2

​

=(0.2)(5)=1V

Now applying KVL for left side mesh, 8−3=V

BE

​

+0.2R+15(0.2)

or 5=1+0.2R+3 or R=5Ω