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A 12 V battery gives a current of 0.5 A. How do I find resistance?
Start with Ohm’s law.
At constant temperature, V = IR.
Rearrange to find resistance:
R = 12 ÷ 0.5 = 24 Ω
Check: 24 Ω × 0.5 A = 12 V.
Your values fit the original equation.
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