Magnetic
Forces
Forces
The space around a magnet where its force can be felt.
What is a magnetic field?
The flow of electric charge.
What is an electric current?
The type of electricity that builds up on the surface of an object.
What is static electricity?
A coil of wire with a current running through it that acts like a magnet.
What is an electromagnet?
The device that uses magnets to show direction.
What is a compass?
This happens when opposite poles of two magnets are brought close together?
What is attraction?
A type of material that allows electric charge to flow easily.
What is a conductor?
This happens when two objects with the same charge come close.
What is repulsion (repel)?
If this stops due to a dead battery or a switch, an electromagnet will lose its magnetism.
What is electric current?
The type of magnet used in junkyards to lift and move heavy metal objects.
What is an electromagnet?
This happens when the same poles of two magnets are brought close together?
What is repulsion (repel)?
The unit is used to measure the electric potential provided by a battery.
What is a volt?
To determine if an object is positively or negatively charged, you compare the number of these two subatomic particles.
What are protons and electrons?
Besides more coils or a stronger battery, this is a third way to make an electromagnet stronger.
What is using a ferromagnetic core?
Type of device that takes motion (such as from flowing water or wind), and converts it into electricity.
What is a generator?
A type of material that is attracted to a magnet. Examples include iron, cobalt, or nickel.
What are ferromagnetic materials?
Materials that resist the flow of electric current.
What are insulators?
What is friction?
Oersted noted it and Faraday described the details, this is found around a wire carrying an electric current.
What are magnetic fields?
Type of device that uses electricity to create motion, such as a fan or in an electric car.
What is an electric motor?
This is what you get if you cut a magnet in half.
What are two smaller magnets?
The term that refers to the path required for electrons to flow, and shares its root with the word for a round shape.
What is circuit?
If an object has an equal number of protons and electrons, its net charge is said to be this.
What is neutral, zero, or balanced?
This is what a NORTH pole of an electromagnet becomes if the battery used in the circuit is reversed.
What is a SOUTH pole?
This special electromagnet uses a constantly changing electrical current to generate sound.
What is a speaker?