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What is the formula to calculate resistance?

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What is the formula to calculate resistance?

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Use these values in Ohm's Law.
If you know the total current and the voltage across the whole circuit, you can find the total resistance using Ohm's Law: R = V / I. For example, a parallel circuit has a voltage of 9 volts and total current of 3 amps. The total resistance RT = 9 volts / 3 amps = 3 Ω.Apr 30, 2019

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