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Transcript of Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you...
![Page 1: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/1.jpg)
Current Electricity
Current, Power and Energy
![Page 2: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/2.jpg)
Current Electricity
• Current Electricity is what you get when you plug something into the wall.
• There are lots of electrons in one place, but they are moving along wires and through electronic devices.
• That is the difference between static and current electricity.
![Page 3: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/3.jpg)
Voltage
• Voltage: is like the Potential Energy of Electricity. It’s what moves the electrons along.
• Ex: A 9volt battery is what pushes the electrons through a toy car.
• Variable: V Unit: Volt (V)
![Page 4: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/4.jpg)
Current
• Current is how fast electrons are moving through an object (like a TV or a light bulb).
• Variable: I Unit: Ampere (A)• Current in electricity is similar to current in a
river…
![Page 5: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/5.jpg)
Current
• The faster we can move electrons, the more Current (I) we can get.
• Current can be calculated using:
t
QI
![Page 6: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/6.jpg)
Example
• A wire carries 10 Coulombs of charge past a certain spot every 2 seconds. What is the current in the wire?
As
CI
t
QI
52
10
![Page 7: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/7.jpg)
Electric Power
• Electric Power is how quickly an object uses electricity to do work.
• Variable: P Unit: Watt (W)
• Most appliances are rated in Watts to tell you how much energy they use.
![Page 8: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/8.jpg)
Electric Power
• Electric Power can be calculated using the formula:
• Electronics with higher power ratings make your power bill go up!
IVP
![Page 9: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/9.jpg)
Example
• If a 1000W microwave is plugged into a 120V outlet, what kind of current will it draw?
IA
IV
W
VIW
IVP
3.8120
1000
)120(1000
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Power Bills
• The power company measures how much power you use in Kilowatts (kW), and they charge by the hour (h).
• THIS IS THE ONLY TIME we’ll use kW and h for our units: when calculating a Power Bill.
![Page 11: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/11.jpg)
Power Bills
• Power Companies charge a certain amount of money per Kilowatt-Hour.
• Your Power Bill comes from:
Amt. of Bill ($) = (rate)(P)(t)
![Page 12: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/12.jpg)
Example
• If you leave your 1500W TV on for a whole day, how much will it cost you if the power company charges 0.008 $/kWh? (Remember 1kW=1000W)
28.0$
)24)(5.1)(/$008(.$
))()(($
hkWKwh
tPrate
![Page 13: Current Electricity Current, Power and Energy. Current Electricity Current Electricity is what you get when you plug something into the wall. There are.](https://reader036.fdocuments.in/reader036/viewer/2022071716/56649ec05503460f94bcc53b/html5/thumbnails/13.jpg)
Review
• Our three new equations are:
))()(($ tPrate
IVPt
QI
Charge (Q) – Coulombs (C)Current (I)- Amperes (A)Voltage (V)- Volts (V)Power (P)- Watts (W)
Power Bill ONLYPower (P)- Kilowatts (kW)Time (t)- hours (h)