P7 - Magnetism And Electromagnetism

Question 1

What is a magnetic field?

Answer 1

The area around a magnet where a magnetic material experienced a force attracting it towards the magnet.

Question 2

What are the 3 magnetic elements?

Answer 2

• Iron
• Nickel
• Cobalt

And steel (which is not an element)

Question 3

What is an induced magnet?

Answer 3

A magnet that is only magnetic when it enters an existing magnetic fired, and stops when it leaves the magnetic field.

Question 4

What is an electromagnet?

Answer 4

A magnet that can be turned in and off.

Needs an electric current in a solenoid (a coil of wire) to work.

Question 5

How to make a magnetic field stronger?

Answer 5

1. Increase current
2. More turns in the wire (coils)
3. Add an iron core
   ~ Will become an induced magnet