Electricity

Lemon Lab:
In this unit we learned about electricity which had to deal with voltage and charge.  Voltage is to electricity as  height is to gravitational potential energy.  Electric potential is voltage and electric potential energy is the charge times the voltage.  What we learned is that the higher the voltage, the higher the charge equals a greater electric potential energy.  In our lab we made a lemon battery that charged an led light.  Basically we used the lemon as a battery to produce the voltage and copper pennies inside of the lemon.  We then transferred the charge through alligator wires onto the pennies to the side of the led light.  The led light converted the electric potential energy and lit up with light.

Class Connection:
For our IPads it uses an internal rechargeable lithium-ion polymer battery.  The voltage varies from about 2.7V to about 4.23V (when fully charged.) The battery is claimed to provide 10 hours of video and 140 hours of audio playback.  As a lot of people know the ipad cannot be charged with an iphone charger even though they look a lot similar.  This is because it requires 2 amps using the included 10W USB power adapter and a USB cord with a USB connector at one end and a 30 pin dock collector at the other.  That means that the iphone charger is too weak to charge the ipad battery because of its low voltage.