OpenSciEd- Unit 8.3 Forces at a Distance

Front

What is a magnetic field?

Back

A magnetic field is an invisible area around a magnet where magnetic forces can be felt. It is created by moving electric charges or by magnets.

Front

What happens when two like poles of magnets are brought together?

Back

They repel each other.

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet that is created by electric current. It can be turned on and off.

Front

What is the role of the cone/membrane in a speaker system?

Back

The cone/membrane vibrates to produce sound when electrical signals are converted into mechanical movement.

Front

Can magnets attract materials other than iron?

Back

No, magnets primarily attract materials that contain iron, nickel, or cobalt.

Front

What is the difference between permanent magnets and temporary magnets?

Back

Permanent magnets maintain their magnetism over time, while temporary magnets only act as magnets when in the presence of a magnetic field.

Front

What is the principle of attraction between opposite poles of magnets?

Back

Opposite poles of magnets (north and south) attract each other due to magnetic forces.

Front

What is the effect of distance on the strength of a magnetic field?

Back

The strength of a magnetic field decreases as the distance from the magnet increases.

Front

What is a compass and how does it work?

Back

A compass is a device that uses a magnetic needle to show direction. The needle aligns itself with the Earth's magnetic field.

Front

What materials can be used to create an electromagnet?

Back

An electromagnet can be made using a coil of wire, a power source (like a battery), and a core material (like iron).