Electricity
This word means “a material that lets electrons move easily.”
Conductor
If I bring 2 North poles together, what will happen to the magnets?
They will repel / push away
What type of force / field is created when electric current flows around a piece of iron?
Magnetism / Electromagnetism
If I = 3 A and R = 4 Ω, find V.
12 V (3 A x 4 Ω = 12 V)
There are 23 ducks, 3 pigs, 4 cows, and 1 man in a field. How many legs are there?
72
This word means “a material that does NOT let electrons move easily.”
Insulator
The 2 ends of a magnet are called what?
Poles (North and South)
Describe 1 difference between a magnet and an electromagnet
-electromagnets require electricity
- electromagnets can be turned on / off
- electromagnet strength can vary based on how strong the electric current is
A toy car motor draws 2 A of current from a 9 V battery. What is the motor’s resistance while it’s running?
4.5 Ω (9V / 2A = 4.5Ω)
The more you take, the more you leave behind. What am I?
Footsteps
When you rub a balloon on your hair, electrons move from your hair to the balloon. What type of charge does the balloon now have?
Negative Charge
What part of a magnet has the strongest field strength?
The ends / poles
This tyoe of machine uses electricity and magnets to create a spinning motion and generate energy
Motor
A device has a resistance of 10Ω and voltage of 20V, what is the Current (I)?
2 Amps (20V / 10Ω = 2A)
I’m the beginning of the end and the end of time and space. I am in everything and surround every place. What am I?
The letter E
If you touch a metal doorknob and get shocked after walking on carpet, that’s a sudden discharge of ____ electricity.
STATIC electricity
If you cut a magnet in half, what happens to its poles?
Describe an everyday object that uses an electromagnet
(Multiple answers accepted)
Cell phone, motor, MRI, etc.
This circuit tyoe gives each bulb its own path so one can go out while others stay on
Parallel Circuit
Halo of water, tongue of wood, walls of stone, long I stood. What am I?
Castle
What is the difference between electric charge and electric current?
Electric charge refers to the number of electrons in/on something.
Electric current refers to moving electrons to generate energy.
Earth's magnetic field is caused by what?
Earth's core (Spinning molten metals/lava)
Describe one way to make an electromagnet stronger?
- more coils
- stronger current
In a series circuit with multiple lightbulbs, what happens if one lightbulb goes out?
They al go out (The series is broken)
A man jumps from a 20-story building with no parachute and survives with no damage. How is this possible?
He jumped from the first floor