Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power,...
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Transcript of Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power,...
![Page 1: Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power, W = Work, and T = Time – Power was defined as the.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f215503460f94c39a3a/html5/thumbnails/1.jpg)
Electrical Power and Energy
![Page 2: Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power, W = Work, and T = Time – Power was defined as the.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f215503460f94c39a3a/html5/thumbnails/2.jpg)
Electrical Power
• We briefly discussed power (P = W/T), where P = power, W = Work, and T = Time– Power was defined as the rate at which work is
done– Electricity can do work• Examples: Hair dryers, fans, power tools etc.
• Electrical Power is defined as the rate at which electrical energy is converted to another form of energy
![Page 3: Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power, W = Work, and T = Time – Power was defined as the.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f215503460f94c39a3a/html5/thumbnails/3.jpg)
Calculating Power• Electrical Power just like power is measured in
Watts• The amount of power used by an appliance is
calculated as:Power = Current x Voltage
orWatts = Amperes x Volts
or P = I x V
![Page 4: Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power, W = Work, and T = Time – Power was defined as the.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f215503460f94c39a3a/html5/thumbnails/4.jpg)
Example
• A calculator has a 0.01 A current flowing though it. It operates with a potential difference of 9 V. How much power does it use?– What do we know? P = I x V• P = ? I = 0.01A V = 9V
P = 0.01A x 9VP = 0.09W
![Page 5: Electrical Power and Energy. Electrical Power We briefly discussed power (P = W/T), where P = power, W = Work, and T = Time – Power was defined as the.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f215503460f94c39a3a/html5/thumbnails/5.jpg)
Another Example
• A microwave oven uses 1000 W of power. The voltage source is 120 V. What is the current flowing through the microwave?
• P = I x V, however we need to calculate for I• I = P/V• I = 1000W/ 120V• I = 8.3A