Physics Final 2018 Chapters 17, 18,19, 20, 21, 12, 13, 14, 15

Electrostatics Charges can be positive or negative A proton has a positive charge at 1.6 x 10-19 C An electron has a negative charge at -1.6 x 10-19 C Electrons can move, protons are stuck Opposite charges attract

Coulomb’s Law Distance and amount of charge affect force

PEelectric, like all energy and work is measured in When two charges interact, there is a force between them. This force creates potential energy. This electric PE is a form of mechanical energy, like KE, GPE and PEelastic PEelectric, like all energy and work is measured in Joules, J

The change of potential energy per charge Measured in J/C or volts Potential Difference The change of potential energy per charge Measured in J/C or volts Ohm’s Law V = IR

Current: How much charge passes in a given time I = DQ/Dt = C/s = amps

a Find equivalent resistance, current in circuit, current in resistor a, power dissipated by a

Magnetic field lines come out of the north and go into the south

Right Hand Rule for Current Velocity of a “+” charge B is the magnetic field strength

Drawing Magnetic Fields Magnetic Vectors have to be shown in 3D Velocity of charge (+) Magnetic field strength Magnetic Force