Electromagnetism

Question 1

When a current flows through a wire what is created?

Answer 1

A magnetic field

Question 2

What is a solenoid?

Answer 2

A coil of wire

Question 3

What does a solenoid do?

Answer 3

increases the strength of the magnetic field that a wire produces

Question 4

What does changing the direction of the current do?

Answer 4

changes the direction of the magnetic field

Question 5

What can you add to a solenoid to increase the field strength by even more?

Answer 5

adding a block of iron in the centre of the coil