Electromagnets
What is an electromagnet?
An electromagnet is a magnet made using electricity.
What is a magnetic field?
It is the area around a magnet where it can attract or push objects
Is the Earth a magnet?
Yes, the Earth acts like a giant magnet.
What do you need to make an electromagnet?
A wire, a battery, and a metal core (like iron).
Which object creates a magnetic field?
Magnets and electric currents
Where are the Earth’s magnetic poles?
Near the North and South Poles.
How can you make an electromagnet stronger?
By adding more coils or using more electricity.
What shape do magnetic field lines make around a magnet?
Curved lines from the north pole to the south pole.
What tool uses Earth’s magnetism to find direction?
A compass.
Why does an electromagnet stop working when the current is off?
Because it needs electricity to create magnet.
How can we see a magnetic field in an experiment?
By using iron filings around a magnet.
Why does a compass needle point north?
Because it follows Earth’s magnetic field.
Where are electromagnets used in real life and why are they useful?
In cranes, motors, and speakers because they can be turned on and off.
How does the strength of a magnetic field change with distance?
It becomes weaker as the distance increases
How does Earth’s magnetic field protect us from space?
It blocks harmful particles from the Sun.