T3L2 Flashcard

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It consists of a coil of wire, often wrapped around a core material, that becomes magnetized when electricity flows through it.

Front

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by increasing the current flowing through the wire or by increasing the number of wire coils.

Front

What is Earth's magnetic field?

Back

Earth's magnetic field is a magnetic field that extends from the Earth's interior out into space, protecting the planet from solar wind and charged particles.

Front

How does Earth's magnetic field protect life on Earth?

Back

It deflects solar wind and charged particles from the Sun, preventing them from stripping away the atmosphere and harming living organisms.

Front

What happens when opposite poles of two magnets are brought close to each other?

Back

They attract each other.

Front

What happens when like poles of two magnets are brought close to each other?

Back

They repel each other.

Front

What occurs if you cut a bar magnet in half?

Back

Each piece would have its own north and south poles.

Front

What happens to the magnetic field of a bar magnet as the distance from the magnet increases?

Back

The magnetic field weakens as the distance from the magnet increases.

Front

What is a magnetic pole?

Back

A magnetic pole is one of the two ends of a magnet where the magnetic force is strongest. Every magnet has a north pole and a south pole.

Front

What is the role of a core in an electromagnet?

Back

The core, often made of iron, enhances the magnetic field produced by the coil of wire, making the electromagnet stronger.