Magnets
Electromagnets
Electricity
Parallel Circuits
Series Circuits
100
Where is the magnetic forced the strongest on the magnet?
The poles
100
What is the difference between an electromagnet and a permanent magnet?
Electromagnets can have their magnetic fields turned on or off and require electricity. Permanent magnets do not require electricity and their magnetic field can not be turned off
100
Electricity travels at the speed of _____________
Light
100
What is a parallel circuit?
a circuit that is broken up into separate independent paths.
100
What is a series circuit?
A circuit where all the parts are aligned one after the other and there is one path of electrical flow.
200
True or False: all metals are attracted to magnets
False
200
True or False: Electromagnets are very useful but not very common.
False
200
Which would be an example of an electrical conductor?
metal
200
Which image is a Parallel Circuit? right or left?
Right
200
Which image is a Series Circuit? right or left?
Left
300
Like (same) poles __________
Unlike (opposite) poles _____________
repel
attract
300
What are 2 ways to increase the magnetic field of your electromagnet?
increase the amount of coils, increase the amount of charge going into the coils (ex. extra batteries)
300
Electric current is the flow of ______
Electrons
300
If lightbulb E burns out, will lights F & G turn off too?
No, the lights F & G have their own path of electricity that is not dependent of lightbulb E
300
If lightbulb B burns out, will A C & D get brighter?
No, all items along a series circuit must be working for energy to flow. If light B burns out, none of the circuit will continue to work.
400
These poles will_______________
repel
400
an electromagnet is created by wrapping _________ with a ________ running through it around a core of material that is easily magnetized (like iron)
coil of wire, current
400
What measurement of electricity do we use for our circuits? (think batteries and lightbulbs)
Volts
400
If the battery below has 25V of electricity, how much energy do both the lightbulbs get?
25V
each bulb has its own energy path
400
Two strings of christmas lights use 100V of electricity.
String A has 80 lights, and String B has 60 lights
Which christmas lights will be brighter? Why?
string B will have brighter lights because there are less lights sharing the same amount of energy.
500
In magnetic objects, all of the ______ are arranged in the _______ direction.
atoms, same
500
Draw a picture of a correctly built electromagnet
500
Define "static electricity"
It is a type of energy that is built up in one location and is not flowing freely
500
Mr. Moore is trying to decide if we should power Kennett Middle School using parallel circuits or series circuits.
As scientists what would you tell him to use? Share your evidence.
Parallel Circuits
these circuits have their own paths, they items along the circuit have their own energy connection, and the school will not lose all of its power if one light bulb blows out.
500
The battery in this series circuit has 21V of electricity.
How much energy does each lightbulb get?
7
21V / 3 lights = 7