A 12 V battery drives current through a 4.0 ohm resistor. What is the current?
Answer and explanation
Correct answer: D. 3.0 A, from I = V/R
- Step 1: Ohm's law: V = IR. Step 2. I = 12 / 4.0 = 3.0. Answer: 3.0 A. Why not the others: the others multiply, invert or subtract.
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