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Physics for IGCSE & O level - Electricity (Section 4 - No. 20)
If a 12V battery supplies current to a 4-ohm resistor, how much current flows through the resistor?
3A
6A
12A
48A
Maelezo
Using Ohm's Law (I = V/R), current = 12V / 4 ohms = 3A.
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