Electrical devices and Power. <ul><li>Lesson objectives: </li></ul><ul><li>Identify energy losses.  </li></ul><ul><li>Powe...
<ul><li>We use electrical devices every day.  They change electrical energy into useful energy at the flick of a switch. <...
What is power? <ul><li>The energy we supply per second to a device is the  power  supplied to it. </li></ul><ul><li>The mo...
P = E/t so  E= Power * Time
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Electricaldevicestrip

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Electricaldevicestrip

  1. 1. Electrical devices and Power. <ul><li>Lesson objectives: </li></ul><ul><li>Identify energy losses. </li></ul><ul><li>Power is the rate of energy conversion. </li></ul><ul><li>Power is measured in Watts, and 1 W = 1 J/s </li></ul>Starter List as many electrical devices in the home as possible. Students with most gets house points.
  2. 2. <ul><li>We use electrical devices every day. They change electrical energy into useful energy at the flick of a switch. </li></ul>
  3. 3. What is power? <ul><li>The energy we supply per second to a device is the power supplied to it. </li></ul><ul><li>The more powerful a device, the faster the rate at which it transforms energy. </li></ul><ul><li>1 watt is a rate of transfer of energy of 1 joule per second (J/s) </li></ul>
  4. 4. P = E/t so E= Power * Time

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