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→Finding Power from Potential Difference and Resistance
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
<math>P=\frac{V^2}{R}</math>
<math>P=\frac{6.8^2}{13}</math>
<math>P=3.5569W</math>
| style="height:20px; width:300px; text-align:left;" |'''2. [[Substitute (Maths)|Substitute]] the numbers into the [[equation]] and [[Solve (Maths)|solve]].'''
<math>P=\frac{V^2}{R}</math>
<math>P=\frac{56^2}{20 \times 10^3}</math>
<math>P=0.1568W</math>