Electricity and magnetism

• The magnetic field lines around the bar magnet are closed loops.
• the power source in the circuit is called the battery and cell
• The voltage is the pressure that the electrons are under and pushes them and is measured in volts
• The current is the flow of electricity in a circuit and the amount of electricity transferred per second
• A series circuit which the current is the same in all branches and has one loop
• Parallel circuits are circuits with more than one branch and more than one loop
• Static electricity is a build up of electric charge on an object
• 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
• When an object gains charge, it becomes unbalanced so it will try to get rid of that extra charge by moving towards another object with opposite charge
• 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