Magnetic Fields
This is the invisible area around a magnet where its force can push or pull.
What is a magnetic field?
This is the invisible region around a charged object where electric force can act.
What is an electric field?
Moving electric charges create this kind of field.
What is a magnetic field?
A push or pull that can change an object’s motion.
What is a force?
A magnetic field is strongest at these parts of a magnet.
What are the poles? (North and South poles)
Electric force can pull or push without objects doing this.
What is touching / making contact?
This device is a magnet made by running current through a coil of wire.
What is an electromagnet?
A force that pulls objects toward each other.
What is attractive?
When two magnets move farther apart, the magnetic force does this.
What is gets weaker / decreases?
When you rub a balloon on cloth, the balloon gains this and can attract paper bits.
What is electric charge? (or electrons / negative charge)
If you increase the number of wire coils on an electromagnet, the strength does this.
What is increases / gets stronger?
A force that pushes objects away from each other.
What is repulsive?
Opposite poles do this; same poles do this.
What is attract; repel?
Name two factors that affect the strength of an electric force.
What are amount of charge and distance?
A changing magnetic field can create this.
What is an electric field? (or electric current)
A property of matter (positive or negative) that causes electric forces.
What is charge?
Name two factors that affect the strength of a magnetic force.
What are distance and magnet strength?
Why can a charged balloon pick up paper without touching it first?
What is: the balloon’s electric field reaches the paper and causes attraction?
Explain how electricity and magnetism are connected in an electromagnet.
What is: electric current (moving charges) produces a magnetic field around the coil?
How strong a force is; affected by distance, charge, or magnet strength.
What is strength? (or magnitude)