Electricity and Magnetism

• Parallel circuits are circuits with more than one branch and more than one loop
• A series circuit which the current is the same in all branches and has one loop
• The current is the flow of electricity in a circuit and the amount of electricity transferred per second
• The voltage is the pressure that the electrons are under and pushes them and is measured in volts
• the power source in the circuit is called the battery and cell
• The magnetic field lines around the bar magnet are closed loops.
• Static electricity is a build up of electric charge on an object, caused by friction.
• objects can be negatively or positively charged
• Opposite charges attract and like repel
• an electro magnet usually has a iron core
• in an atom there is an electrons (negative) on the outside
• in an atom there is a nucleus (positive) on the inside and neutrals
• normally positive and negative charges cancel out because it has the same number if each
• electric current flows from high potential difference to low potential difference
• the more charge something has the stronger its force of attraction/repulsion
• a conductor allows electricity to flow through it easily