ELECTROMAGNETS

Question 1

What is produced when an electrical current flows through a wire?

Answer 1

A magnetic field

Question 2

What is the magnetic field created in?

Answer 2

circles around the wire

Question 3

Does the magnetic field get weaker when further away from the wire?

Answer 3

Yes

Question 4

What happens if you coil a wire in the magnetic field?

Answer 4

Coiling the wire concentrated the magnetic field inside the loops.

Question 5

A coil makes a field ________ than for a single loop

Answer 5

much stronger

Question 6

What is a simple electromagnet?

Answer 6

A simple electromagnet is a coil of insulated wire over an iron core.

Question 7

What are the coils called in a simple electromagnet?

Answer 7

solenoid

Question 8

• When on, the core becomes ….
• When off, the core is ….

Answer 8

1. magnetised
2. not magnetised

Question 9

What are some ways to increase the strength of an electromagnet?

Answer 9

1. Use more coils in the wire
2. Increase the current in the wire
3. Type of core

Question 10

Will passing a solenoid through a magnet generate current?

Answer 10

Yes