Electromagnets

Question 1

What is a Solenoid?

Answer 1

A coil of wire

Question 2

How do you increase the strength of the magnetic field that wire produces?

Answer 2

Wrapping more wire into a coil called a Solenoid

Question 3

What does wrapping more wire increase the strength of the magnetic field that wire produces?

Answer 3

The field lines around each loop of wire line up with each other, this results in lots of field lines pointing in the same direction that is very close to each other.

Question 4

How can you increase the field strength of Solenoids?

Answer 4

Putting an iron block in the centre of the coil. This Iron core becomes an induced magnet when the current flows.

Question 5

What happens if you stop the current?

Answer 5

The magnetic field disappears

Question 6

What is a solenoid with an iron core called?

Answer 6

Electromagnetic ( a magnet whose magnetic field can be turned on and off with an electric current)