What is the resistance of a circuit that draws 4 amperes from a 12-volt source?
توضیح
Dividing voltage by current gives R = 12 / 4 = 3 ohms. The 48 ohm choice multiplies rather than divides, and 16 ohms adds.
Dividing voltage by current gives R = 12 / 4 = 3 ohms. The 48 ohm choice multiplies rather than divides, and 16 ohms adds.