WorksheetsMagnetism
Total questions: 15
Worksheet time: 10mins
Alex and his friends make four different electromagnets. Put the electromagnets below in order of strength, starting with the weakest. Write the letter in the correct order.
A. 50 turns, low current, copper core
B. 100 turns, high current, iron core
C. 50 turns, low current, iron core
D. 100 turns, low current, iron core
A,D,B,C
A,B,D,C
A, C, D, B
A,C,B,D
Which of these field patterns is correct?
A
B
C
D
How could a student go about demagnetising a piece of magnetised steel?
Place it inside a coil of wire and pass direct current through the coil.
Place it near a piece of unmagnetised metal.
Expose it to temperature below 0 °C for a long period.
Hit it repeatedly with a hammer.
A student makes a series of statements about a permanent bar magnet. Which of them is true?
The north pole of a permanent bar magnet will repel the north pole of another magnet.
A permanent bar magnet must be made from a soft magnetic material.
A permanent bar magnet can repel a magnetic material.
The magnetic field lines of a permanent bar magnet cross each other where the field is strongest.
Which of the following choices of metal would be suitable for
A
B
C
D
A student wants to find out which end is the magnet’s north pole. What could he do to find out?
Put the magnet under a piece of paper, and sprinkle iron filings on top.
Put it near to a piece of magnetic material, like a steel paperclip.
Place a compass near it.
Put it near a piece of magnetic material.
When two magnets repel each other, which poles are facing each other?
North and South
North and North
East and West
West and West
What happens to the magnetic force as a non-magnetic material gets further away from the magnetic field?
The force increases.
The force stays the same.
The force decreases.
There was no force to begin with.
Which statement about the magnetic field around a bar magnet is correct?
The magnetic field is the same strength all around the magnet.
The magnetic field is strongest at the poles of the magnet.
The magnetic field is strongest near the middle of the magnet.
The magnetic field is stronger at the south pole than the north pole.
Which of the following is not the property of a permanent magnet?
Like magnetic poles repel each other and unlike magnet.ic poles attract each other.
It attracts magnetic materials like iron, cobalt, and nickel.
A freely suspended magnet always points in a north-south direction.
Its magnetism can be switched on and off.
The diagram shows what happens when bars X and Y are brought near to each other.
Which one of the following statements is correct?
X is a magnet but Y is a magnetic material.
Both X and Y are magnets.
X is made of aluminium but Y is made of iron.
Both X and Y are made of non-magnetic materials.
Are the magnetic field lines in the picture correct?
Yes, because they point from north to south.
Yes, because the North pole is on the left in all pictures.
No, because they point from north to south (they're supposed to go the other way).
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
You know this object is magnetised because _____________.
all the domains have right angles
the arrows are drawn in red
the domains are aligned
the domains are random
If you cut a magnet in half, what happens to the poles?
One half gets the North Pole, the other half gets the South Pole
Both halves get only a North Pole
Both halves get only a South Pole
Both halves get a North pole and a South Pole
Select three ways we can increase the strength of an electromagnet?
Add an iron core
Reduce the number of turns on the coil
Increase the current in the coil
Increase the number of turns on the coil
Remove the iron core
