Electricity and Electromagnetism: Webquest
Electricity and electromagnetism: Webquest
BBC Electricity and Magnetism http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/magnets_electric_effects/activity.shtml Questions:
1. Why is an iron core needed in an electromagnet?
2. How are electromagnets different to either temporary or permanent magnets?
3. What happens when you add more coils to the wire in an electromagnet? What else can you do to increase the magnetic field of an electromagnet?
Electromagnet Simulation http://www.fossweb.com/modules3-6/MagnetismandElectricity/activities/electromagnet.html This is an interactive simulation of an electromagnet. Your goal is to test the different factors that can change the strength of the magnet (i.e. how many fillings it can pick up). For each factor that you test you must decide on a standard to compare it against. This means that all other factors must remain the same while you test only one of them.
1. What is the effect of changing the....
a. Type of Wire:
b. Thickness of the wire (gauge):
c. AC or DC power supply
d. Voltage:
e. Number of Winds in the wire:
2. Can you make the electromagnet pick up all of the iron fillings? What conditions did you need?
Uses for electromagnets:
Describe how an electric bell works and provide a diagram http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/magnets_electric_effects/revise5.shtml Diagram
How it works
How does a loudspeaker work? http://electronics.howstuffworks.com/speaker6.htm http://www.explainthatstuff.com/loudspeakers.html
Diagram
How it works
How is a magnet used inside of a simple AC generator? http://www.pbs.org/wgbh/amex/edison/sfeature/acdc_insideacgenerator.html Diagram
How it works
BBC Electricity and Magnetism http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/magnets_electric_effects/activity.shtml Questions:
1. Why is an iron core needed in an electromagnet?
2. How are electromagnets different to either temporary or permanent magnets?
3. What happens when you add more coils to the wire in an electromagnet? What else can you do to increase the magnetic field of an electromagnet?
Electromagnet Simulation http://www.fossweb.com/modules3-6/MagnetismandElectricity/activities/electromagnet.html This is an interactive simulation of an electromagnet. Your goal is to test the different factors that can change the strength of the magnet (i.e. how many fillings it can pick up). For each factor that you test you must decide on a standard to compare it against. This means that all other factors must remain the same while you test only one of them.
1. What is the effect of changing the....
a. Type of Wire:
b. Thickness of the wire (gauge):
c. AC or DC power supply
d. Voltage:
e. Number of Winds in the wire:
2. Can you make the electromagnet pick up all of the iron fillings? What conditions did you need?
Uses for electromagnets:
Describe how an electric bell works and provide a diagram http://www.bbc.co.uk/schools/ks3bitesize/science/energy_electricity_forces/magnets_electric_effects/revise5.shtml Diagram
How it works
How does a loudspeaker work? http://electronics.howstuffworks.com/speaker6.htm http://www.explainthatstuff.com/loudspeakers.html
Diagram
How it works
How is a magnet used inside of a simple AC generator? http://www.pbs.org/wgbh/amex/edison/sfeature/acdc_insideacgenerator.html Diagram
How it works