Question

Question No 2 Solve the following circuit find total resistance RT. Also find value of voltage across resister RC.

Answer 1

Since , Rc and R5 are in series,

and

Rb and R4 are in series,.

But they both pairs are in parallel with each other,.

So, Rc + R5 = 3 + 12 = 15 ohm

and , Rb + R4 = 2 + 18 = 20 ohm.

They are parallel so,

1/R = 1/15 + 1/20 = 4+3 / 60 = 7/60

R = 60/7 = 8.6 approximately

Now, This pair is in Series with Ra

So, Ra + R = 6 + 8.6 = 14.6

Total resistance RT = 14.6.

Voltage across resistor RC = I x R = 10 x 3 = 30v