Question

A complete circuit contains two parallel-connected devices and a generator for providing the electromotive force. The resistance of the first device is 12 ohms, the resistance of the second device is 4 ohms, and the voltage developed by the generator is 40 V. What is the magnitude of the current flowing through the first device?

Answer 1

Answer is: 3.33 Amperes (A) 

Given: 

Device 1: 12 ohms 

Device 2: 4 ohms 

Voltage Total: 40 V (Volts) 


Solution: 40 V = V1 = V2 

Voltage = IR 

I1 = V1 / R1

I1 = (40 V) / (12 Ohms) = 3.334 A (Amperes) 

I1 = 3.33 A 

Answer 2

A.would be the right answer hope this helps.