Resistors of 2 ohm and 4 ohm are connected in series to a 12 V battery. What current flows?
Answer and explanation
Correct answer: D. 2 A
- Step 1: In series the total resistance is 2 + 4 = 6 ohm.
- Step 2: I = V / R = 12 / 6 = 2 A.
Answer
2 A.
Why not the others: '6 A' uses only the first resistor; '3 A' uses only the second resistor; '9 A' uses the parallel combination instead of the series total.
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