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

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?

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