Electricity and Electronics: Can someone please help me?

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P. J

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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?

A. 3.33 A
B. 8 A
C.10 A
D 13.32 A
 
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