6.7.2.1 electromagnetism

Question 1

What happens when a current flows through a conducting wire

Answer 1

A magnetic field is produced around the wire

Question 2

What does the strength of the magnetic field depend on

Answer 2

The current through the wire and the distance of the wire.

Question 3

What can increase the strength of the magnetic field created by a current through the wire.

Answer 3

Producing (shaping) a wire to for a solenoid

Question 4

What is the magnetic field inside a solenoid like

Answer 4

Strong and uniform

Question 5

What does the magnetic field around a solenoid have a similar shape to

Answer 5

A similar shape to that of a bar magnet

Question 6

What can increase the strength of the magnetic field of a solenoid

Answer 6

Adding an iron core to

Question 7

An electromagnet is a solenoid with an..

Answer 7

Iron core

Question 8

What is the purpose of placing an iron core into a solenoid

Answer 8

helps to concentrate all the magnetic lines of forces through the solenoid so that the magnetic field is uniform at the cross section of the core

Question 9

Why is magnetic field stronger with an iron core?

Answer 9

the soft iron core is a highly ferromagnetic material, It allows (and attracts) the magnetic field lines to pass through it.