alleryA 12 V battery drives a current through a 4 ohm resistor. What current flows?
A3 A
B48 A
C8 A
D16 A
Answer & Solution
Correct answer: A. 3 A
1. Use I = V/R.
2. I = 12 / 4 = 3 A; 48 A comes from wrongly multiplying, 8 A and 16 A from adding or subtracting.
3. So the current is 3 A.
_Source: Wikipedia, Electric current, Ohm's law_
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