Question

What is the resistance of resistor R1?
(1 point)
3.00
2.00
7.50
5.00

Answer 1

Current in first junction R1, R2 = 5 amps

Since current thru R2 = 3 amps the current thru R1 = 2 amps

V1 = V = I1 R1 = 15 volts

R1 = 15 volts / 2 amps = 7.5 ohms