PHY 205 Lecture Notes - Lecture 24: Elastic Energy, Gravitational Energy, Contact Force
Document Summary
Magnets are materials such as iron, nickel, and cobalt that can experience a non- contact force similar to forces on an electric field. The magnetic field goes from north to south you can show this by drawing arrows on your lines going south. The closer together the lines are, the stronger the magnetic field. When a wire gains electricity it grow a magnetic field perpendicular to the wire. Electromagnets are magnets that turn or off when an electric current is passed through it. They are used to lift things up or down and can be used with other circuit as a switch. Is the driving force that pushes the charge around. Anything that slows down the flow of the current. When certain insulating materials rub together, negatively charged electrons a rubbed onto each other leaving materials electrically charged. Contact forces work when two or more objects are touching.
