Worksheetselectromagnetism GCSE
Total questions: 16
Worksheet time: 11mins
A compass needle responds to a magnetic field, because the compass needle is a
A. generator
B. motor
C. magnet
D. transformer
Electric current is measured in ____________.
Newtons (N)
Amperes (A)
Hertz (Hz)
Volts (V)
A _______________ is a current-carrying coil of wire with lots of loops.
magnet
electromagnet
solenoid
compass
Increasing the number of coils in an electromagnet will _________ the power of the magnet.
decrease
increase
not affect
What three minerals are attracted to a magnet?
Gold, copper, cobalt
Cobalt, aluminum, silver
Iron, copper, aluminum
Iron, nickel, cobalt
What happens if you cut a magnet in half?
Nothing
The magnets repel
There will be two magnets
How can you increase the magnetic field strength in an electromagnet?
Increase the number of coils.
increase the voltage
increase the current by reducing the resistance of the coil
all of the above
How can you decrease the magnetic field strength in an electromagnet?
Increase the number of coils.
increase the voltage
decrease the current by increasing the resistance of the coil
all of the above
What did Oersted discover about Induction?
That a changing magnetic field induces a current in a conductor.
That electricity and magnetism were related when he noticed a current carrying conductor deflected the compass of a needle.
That the Earth's magnetosphere deflected charged particles from the sun known as solar winds.
That alternating current could be manipulated with transformers.
If you brought an unknown pole of a magnet near a North magnetic pole and they repel what is the unknown pole?
North
South
Neutral
not enough information
What do we know about Earth's Magnetosphere (magnetic field)?
It is likely caused my the molten iron core of the Earth.
It protects us from solar winds.
It causes the auroras.
all of the above.
