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