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WorksheetsPhysics Is Attractive
Total questions: 28
Worksheet time: 14mins
Which materials are magnetic
Iron
Steel
Nickel
Cobalt
Copper
Which magnets will '1' repel?
1
2
3
4
Magnets 1 & 2 will....
Attract
Repel
Magnets 3 & 4 will...
Attract
Repel
If the brown block is attracted in both arrangements then...
It can't be a magnet
It can't be magnetic
It must be magnetic
It might be made of iron
This process can be used to make a bar magnet. A suitable material to use would be...
Iron
Steel
Copper
Brass
The north pole of this magnet is at...
A
B
You can tell the magnetic field is strongest at the poles (A&B) because...
The field lines are closer together there
The arrows come from the poles
The field lines end there
You can find the shape of a field around a bar magnet using...
Iron filings
Plotting Compasses
You can find the direction of the magnetic field around a bar magnet using...
Iron Filings
Plotting Compasses
The poles should read from left to right...
N S / N S
N S / S N
S N/ N S
S N / S N
These magnets are...
attracting
repelling
These magnets are...
Attracting
Repelling
The poles should read from left to right...
NS/ NS
NS / SN
SN / NS
SN / SN
A plotting compass placed at the 'X' will point...
Up
Down
Left
Right
A plotting compass placed away from magnets and magnetic materials will point...
Up
Down
Left
Right
North
When a magnetic material is placed in a magnetic field its domains...
Align with the field
Do nothing
Stay jumbled up
A soft magnetic material has domains that...
Align with a magnetic field and then become misaligned when the field is gone
Stay aligned with the magnetic field even after the field is removed.
Hard magnetic materials have...
Domains that remain aligned after the magnetic field is removed
the ability to retain their magnetism
No iron, nickel or cobalt in them
Which of these are hard magnetic materials?
Iron
Steel
Brass
Copper
The shape of the magnetic field around an electromagnet looks like....
A rectangle
A coil
The same shape as the field around a bar magnet
To make an electromagnet you need...
An iron core
A coil
Some iron filings
A cell or battery
To make an electromagnet stronger you could...
Increase the coils
Increase the turns on the coil
Try it without a core
Increase the current in the wires
To measure the strength of an electromagnet you could...
See how many paperclips it can pick up
See the mass of iron filings it can pick up
See how many volts it uses
See how hot it gets after 10 seconds
Electromagnets don't use steel as a core material because...
It's expensive
It rusts
It's magnetically hard, so the magnet remains attracted to magnetic materials when it's switched off.
Electromagnets are used in...
Scrapyard cranes
Electric door locks
Compasses
Heaters
When it's switched on this electromagnet can pick up 5 paperclips. When it's switched off how many paperclips will it hold?
0
1
3
5
This electromagnet has a steel core and is switched on for a few minutes, when it's switched off what will happen to the steel core?
Nothing
It will be like a bar magnet
It will get hot
It will still hold some paperclips
