Static Electricity
Objects that have LIKE charges _______.
Objects that have UNLIKE charges _______.
repel
attract
battery (power source)
wire
light bulb (load)
switch
A material through which electric charges flow easily
conductor
An object that can push or pull on iron without touching the metal
an example of static electricity in nature
lightning
What is the function of a battery in a circuit?
It provides the "push" to keep electrons moving in the circuit. (power source)
If the north pole if 2 magnets are close, they will _____.
repel
You rub a plastic comb with wool. Why will the comb then attract small bits of paper?
the comb now has a negative charge (too many electrons)
How can you change/add to a simple circuit?
Add more loads (light bulb, fan, etc)
Add another battery
Switch order of wires
Name 2 examples of conductors
copper, iron, gold, water, aluminum, steel, silver
Increasing the amount of current flowing through an electromagnet will make it
stronger
What happens when you rub a balloon on your head, then stick it to the whiteboard?
The balloon picks up electrons from your hair, which gives it a negative charge.
The negative balloon is attracted to the positive whiteboard.
In which part of the circuit is electrical energy transformed into another form of energy?
the load
Give 3 examples of insulators
most plastics, glass, cloth, sand, rubber, wood, dry air
2 advantages of electromagets
They can be turned off and on.
They can be made stronger or weaker.
They direction of the magnetic field can be changed (switch the poles) by switching the ends of the battery.
What is it called when electrons move quickly from one object to another?
electric discharge
How does a light bulb work?
The filament is very thin, so electrons have a hard time passing through. When electrons do pass through, the filament becomes hot and begins to glow.
Build a circuit to see if the object lights the bulb or not
How can you turn a magnet into an electromagnet?
Wrap the wires of a battery circuit around an iron core to create a magnetic field