Magnets
Magnetic Fields
Electromagnets
100
What type of magnet only becomes magnetic when placed in a magnetic field?
Induced magnet
100
What happens when North and North poles are near eachother?
Repel
100
Use the Right Hand Thumb Rule to find the direction of the magnetic field around the wire.
Above - into the page
Below - out of the page
200
Which diagram shows a magnet? Explain your answer.
The second one. As domains are aligned.
200
Draw the magnetic field around a bar magnet
- Magnet burger
- North to south
200
Define solenoid.
Current-carrying (1) coil of wire (1)
300
Explain why the paper clips attract in a chain. Use the term induced magnet, magnetic field, North/ South pole
Paperclip becomes an induced magnet.
The end of the paperclip close to the North pole of the permanent magnet become the South pole.
300
Explain how a compass works.
- Compass needle is a mini permanent magnet
- Aligns
- with the magnetic north pole of the earth
300
Describe three ways you could strengthen an electromagnet.
Increase the:
- Current
- Coils
- Core
400
List the four magnetic materials (SINC)
Steel
Iron
Nickel
Cobalt
400
Explain how to plot a magnetic field around a bar magnet
Place plotting compass at pole of magnet
Mark where needle of compass points with pencil
Move compass to this mark and repeat
Continue until you reach the other pole
400
What does the iron core in the electromagnet become when current flows through the solenoid?
An induced magnet
500
Ms. Zuk has a mystery block. How would she know if it is a magnet, magnetic, or non-magnetic?
Magnet - both attracts and repels
Magnetic - only attracts
Non-magnetic - neither repels or attracts
500
What does a current-carrying wire produce?
A magnetic field
500
Harvey and Ben investigate whether increasing current will affect the strength of the magnetic field of an electromagnet.
Identify the:
Independent variable
Dependent variable
Control variable
Independent variable = current
Dependent variable = strength of the magnetic field
Control variable = same number of coils OR same size iron core