Electromagnet Flashcard 2022

Front

What is an electric field?

Back

An electric field is a region around a charged particle where other charged particles experience a force. It is represented by field lines that indicate the direction and strength of the field.

Front

How does distance affect the strength of an electric field?

Back

The strength of an electric field decreases as the distance from the charged object increases. This is because the field lines spread out, making the field weaker.

Front

What does it mean when electric field lines are further apart?

Back

When electric field lines are further apart, it indicates a weaker electric field in that region.

Front

What is the relationship between electric current and brightness of a bulb in a circuit?

Back

The brightness of a bulb is directly related to the strength of the electric current flowing through it; a stronger current results in a brighter bulb.

Front

What is the direction of electric field lines for a positive charge?

Back

Electric field lines for a positive charge are always directed away from the charge.

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 can be turned on and off by controlling the current.

Front

What factors can affect the strength of an electromagnet?

Back

The strength of an electromagnet can be affected by the amount of electric current, the number of coils of wire, and the type of core material used.

Front

What is the purpose of a hand generator?

Back

A hand generator converts mechanical energy into electrical energy by spinning a magnet within a coil of wire, creating an electric current.

Front

How can you measure the speed of a motor?

Back

The speed of a motor can be measured by counting the number of rotations it makes in a given time period, often expressed in rotations per second.

Front

What happens to the direction of current when the battery poles are switched?

Back

When the battery poles are switched, the direction of the current in the circuit also reverses.