Changes

===Example Calculations===

{| class="wikitable"

| style="height:20px; width:300px; text-align:center;" |An [[LED]] uses 842J over a period of 120 seconds. Calculate the '''power''' of the [[LED]] correct to two [[Significant Figures|significant figures]].

|}

{| class="wikitable"

| style="height:20px; width:300px; text-align:center;" |A light bulb is supplied a current of 625mA. The [[Potential Difference|potential difference]] across the terminals on the [[Electrical Bulb|light bulb]] is 96 [[volt]]s. Calculate the [[power]] of the [[Electrical Bulb|bulb]] correct to two [[Significant Figures|significant figures]].

<math>P \approx 2100W</math>

|}