1. Hans Oersted –. recognized, when working with
Hans Oersted – recognized, when working with electric currents that the needle of a nearby compass moved
Why coils – coils reinforce the field
Conclusion:
Moving electric charges generate a magnetic field
Historical significance of this discovery –
it is the most important discovery in modern science

2. Electric motor – if moving electric current can generate a magnetic field, this magnetic field can interact with another magnetic field and cause motion.
How can this be used as a motor?
the interaction of the two magnetic fields can cause motion, if we can reverse the direction of one of the magnetic fields, we can cause constant motion
AC motor – the current alternates to cause the direction of the magnetic field to alternate:
DC motor – direct current, need a split ring commutator to cause current direction to change

3. Hypothesis – If electric current can produce magnetic effects, it may follow that magnetism can produce electric current
Conclusion:
Electric current can be produced by changing magnetic fields
How is this phenomena useful?
it allows us to generate electricity

4. Energy Source – source of electrical energy
Wall outlet, battery, generator
Wires – conductors to carry the flow of current
Usually copper or aluminum
Load – device that converts electrical energy into other forms
Light bulb, motor
Water analogy – energy source = pump
wires = pipes
load = sprinkler

5. Potential – electrical pressure (volts)
Current – flow of electrons (amperes)
Resistance – extent to which electrons are impeded through a circuit (ohms )
Power – the rate at which electrical energy is converted to other forms (watts)