Magnetism
What magnet keeps it's magnetism?
A permanent magnet
When does the magnetic field arise?
When a charge is in motion.
Electromagnetism is the relationship between _______ and ________.
Electromagnetism is the relationship between magnetism and electricity.
What is an electromagnet?
An electromagnet is a magnet that runs on electricity.
Your thumb tells you which direction the ______ is going.
Your thumb tells you which direction the current is going.
Which magnet loses it's magnetism over time?
A temporary magnet
What are the three ways you can increase the magnetic field around a straight wire?
Increase the current, move closer to the wire, and coil the wire.
What are three ways to increase the magnetic field of an electromagnet?
Increasing the electric current, increasing the number of wire coils, and adding an iron core.
This is the term for a long, tightly wound coil of wire that acts as a magnet when an electrical current passes through it.
Solenoid
Your fingers tells you which direction the ______ ______ is going.
Your fingers tells you which direction the magnetic field is going.
Magnetism can work over a _________.
Magnetism can work over a distance.
Why does Earth have a magnetic field?
The Earth's core is magnetic
what are some examples of electromagnetism in real life?
washing machines,electric fan,electric motors,and etc
What are some examples of electromagnets and solenoids?
some examples of electromagnets and solenoids are Speakers,microphones,car,electric bells, and headphones
If the direction of the current is going UP, what direction is the magnetic field?
The magnetic field travels to the left.
What are the three main metals that magnets are made of?
Iron, nickel, cobalt.
Where are the magnetic field lines the strongest?
When the field lines are closer together.
What is the most common design of an electromagnet?
Coil of wire + Iron core + Electric current
= 🧲 Electromagnet
This is the main practical advantage of an electromagnet over a permanent magnet.
Being able to turn it on and off.
If the current changes direction, what happens to the magnetic field?
The magnetic field reverses direction.
What is magnetism caused by?
Magnetism is caused by motion of electric charges.
Magnetic field lines go from ______ pole to _______ pole.
Magnetic field lines go from North pole to south pole.
Electromagnetism is produce by a current of _______.
Electromagnetism is produce by a current of electricity.
Solenoids and electromagnets convert electrical energy into this type of energy.
Magnetic or mechanical energy/motion
Traditional current flow goes from ______ to _______.
Traditional current flow goes from positive to negative.