Ohm's Law
Voltage = Current × Resistance
Current = Voltage ÷ Resistance
Resistance = Voltage ÷ Current
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| Fig. 1 Ohm’s Law diagram |
E ÷ I = R
E ÷ R = I
I × R = E
Watts
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| Fig. 2 Watt’s Law circle |
P ÷ E = I
P ÷ I = E
I × E = P
12 formulas can be formed by combining Ohm’s Law and Watt’s Law
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| Fig. 3 The 12 Watt’s Law formulas |