WorksheetsAKS 9: Magnetism and Electromagnetism
Total questions: 16
Worksheet time: 27mins
The picture is an example of an: (a)
You know this substance is magnetized because (a)
To make this electromagnet stronger you could:
use less wire
have fewer wire coils around the nail
have more wire coils around the nail
use a plastic core
What happens to the domains of a ferromagnetic material when they are placed in a strong magnetic field?
The domains aligned with the field become bigger
The number of magnetic domains increases
All the magnetic domains point in the same direction
The magnetic domains point randomly
moving the wire near a magnet.
moving a magnet near the wire.
changing the current in a nearby wire.
all of these
Electric current would disappear
The magnet would explode
Electric current will flow through the wire (voltage induced)
It would produce a gravitational field
A magnet can move in a coil of wire to produce electricity in which system? (a)
Which action will increase the deflection of the galvanometer pointer?
The magnetic pole is reversed
The number of turns of coils is increased
The coil is made from insulated wire
The magnet is slowly pushed into the coil
If you break a bar magnet in half, each half...
(a)
Electronic devices create magnetic fields because they
are magnets
are compasses
have moving particles with electric charge
How can you test to see if there is a current running through a wire?
listen carefully to see if you hear a buzzing sound
place several compasses around the wire
place several batteries around the wire
A device that transforms electrical energy to mechanical energy is a (a)
How are electromagnets different from permanent magnets?
magnets can be turned on/off
you can turn an electromagnet on/off
magnets are more powerful
magnets have a North and South pole
What conclusion can you draw from this graph?
As current increases, magnetic strength decreases.
As current increases, magnetic strength increases.
As current decreases, magnetic strength increases.
There is no relationship between current and magnetic strength.
Which of the following will produce the strongest electromagnet?
A coil of 20 turns of wire with no iron core
A coil of 20 turns of wire with an iron core
A coil of 40 turns of wire with no iron core
A coil of 40 turns of wire with an iron core
