Magnetism and Electricity

Front

What is a magnetic field?

Back

A magnetic field is a field of force produced by moving electric charges.

Front

What do the lines around a magnet represent?

Back

The lines around a magnet represent the magnetic field.

Front

What happens to iron filings when placed in a magnetic field?

Back

Iron filings align themselves along the lines of the magnetic field, showing the direction and strength of the field.

Front

What type of electricity is created when two objects are rubbed together, causing a charge to build up?

Back

Static electricity.

Front

Is rubber a conductor or an insulator?

Back

Rubber is an insulator.

Front

What is the difference between conductors and insulators?

Back

Conductors allow electric charges to flow freely, while insulators do not.

Front

What are opposite poles of a magnet?

Back

Opposite poles of a magnet are the north and south poles, which attract each other.

Front

What is the principle behind electromagnetism?

Back

Electromagnetism is the interaction between electric currents and magnetic fields.

Front

How can you increase the strength of an electromagnet?

Back

You can increase the strength of an electromagnet by increasing the current, adding more coils of wire, or using a ferromagnetic core.

Front

What is the role of a magnetic field in electric motors?

Back

A magnetic field interacts with electric currents in the motor to produce rotational motion.