Electrical Safety
Mareel PULLS on the cord to unplug her iPad. What can she do differently to practice electrical safety?
She can gently unplug the outlet from the wall
What happens to an electromagnet when the power source is disconnected?
It loses its magnetism
What are materials like rubber, wood, or plastic?
Insulators
Electrical Energy--->
Electrical Energy---> Light/Radiant Energy
Ryland is at swimming practice and wants to dry his hair with a hairdryer while he's STILL in the pool! Why is this dangerous?
What is the effect on the strength of an electromagnet if you increase the number of coils of wire?
The strength of the electromagnet increases?
This type of charge is found on the surface of an object when it has extra electrons
A negative charge
A heater
Electrical energy --->
Electrical energy ---> Thermal energy
Melvin notices that the wires on his headset are stripped, which means that he can see the copper wires! What should he do?
Melvin should ask his teacher for a new headset, because the INSULATOR around wires is what keeps the electrical current INSIDE the wire.
Name a type of material is NOT attracted to a magnet and will not help an electromagnet work
plastic or wood
This happens when you rub a balloon on your hair, and it makes your hair stand up.
Electrons are transferred, causing a buildup of static electricity?
A blender
Electrical energy --->
Electrical energy ---> Mechanical energy
Ms. Merritt and Ms. Kim are doing a science experiment where they are testing different types of batteries by making an electromagnet. They start with a 1.5V battery and then try a 6V battery.
What might they notice happens when they use a higher voltage battery in their experiment?
They might notice that the battery is heating up and sparking!
Always take close observations of your experiments to be safe and disconnect the circuit if you need to.
What is magnetic force?
This term describes the force that an electromagnet can exert on objects made of iron, steel, or other magnetic materials.
When two objects with opposite charges come close to each other, they will do this
They will attract each other
An oven
Electrical energy ---> _____
Electrical energy --->Thermal energy
Mr. McPhail can't get his toast out of the toaster! He reaches for a metal fork to help get it out.
1. Why is this dangerous?
2. What can Mr. McPhail do instead?
1. Because metal is a conductor
2. Mr. McPhail can unplug the toaster before trying to the toast out
This type of current is used to create electromagnets
An electrical current
This is the material that is often used to create static electricity because it can gain or lose electrons easily.
Rubber or wool material
A clothes dryer
Electrical energy ---> _____ and ______
Electrical energy ---> mechanical and thermal energy