(a) What is the equivalent resistance of the circuit shown below if R 1 = 12.5 ?

Question

(a) What is the equivalent resistance of the circuit shown below if R1 = 12.5 ? and R2 = 13.0 ? ?
     ?

(b) What current flows through R1?
     A

(c) What is the voltage drop across R2?
     V

(d) What current flows through R2?
     A

(e) How much power is dissipated in R2?
     W

What is the equivalent resistance of the circuit shown below if R1 = 12.5 ? and R2 = 13.0 What current flows through R1? What is the voltage drop across R2? What current flows through R2? How much power is dissipated in R2?

Explanation / Answer

a)
R2 in parallel with (20 + 30) = 12.91 ohms
Add 15 + R1 = 37.41 ohms <<<
b)
I = E/R = 24/37.41 = 0.742 amps <<<
c)
24*12.91/(12.91 + 24.5) = 8.28 v <<<
d)
8.28/13 = 0.63 A <<<
e)
P = E^2/R = 3.94 watts <<<

All answers rounded to 2 dp

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