8.3 Lesson Set 1 Review Flashcard

Front

What is a magnetic field?

Back

A magnetic field is an invisible area around a magnet where magnetic forces can be detected. It is created by moving electric charges, such as those in a coil of wire connected to a battery.

Front

What happens when a coil of wire is connected to a battery?

Back

The coil creates a magnetic field, which can attract or repel nearby magnets.

Front

What is polarity in relation to magnets?

Back

Polarity refers to the orientation of the magnetic field, with a north and south pole. Reversing the polarity of a battery changes the direction of the magnetic field produced by a coil.

Front

What occurs when like poles of magnets are brought together?

Back

Like poles (north-north or south-south) repel each other, causing a repulsion force.

Front

What occurs when opposite poles of magnets are brought together?

Back

Opposite poles (north-south) attract each other, causing an attraction force.

Front

How can energy transfer occur without direct contact?

Back

Energy can transfer through forces that act at a distance, such as magnetic or gravitational forces.

Front

What is the effect of bringing two magnets closer together?

Back

You may observe a stronger magnetic attraction or repulsion depending on the poles facing each other.

Front

What is the evidence that a magnetic field is present?

Back

A magnetic field can be evidenced by its ability to attract or repel other magnets.

Front

What happens to the magnetic field when the battery connections to a coil are reversed?

Back

The direction of the magnetic field and the resulting force produced by the coil will also reverse.

Front

What is the role of electric current in creating a magnetic field?

Back

Electric current flowing through a wire generates a magnetic field around the wire.