Magnetism

(Gr 10 Physics Part 1)

The pole at the end of a magnetic that points in a northerly direction is the

north magnetic pole.

The pole at the end of a magnetic that points in a southerly direction is the

south magnetic pole.

What do magnetic forces do to each other?

Exert magnetic forces to each other that can attract or repel.

Give examples of Ferromagnetic materials

iron , nickel, cobalt and their alloys.

What is a magnetic field

A magnetic field is any area in space in which a magnetic material will experience a magnetic force.

What is the direction of a magnetic field of any point?

The direction of a magnetic field in any point is the the direction in which the N pole of a freely rotating magnet will point.

Vector of a magnetic field

vector

Vector of a electrical field

vector

Vector of a gravitational field

vector

Direction of a magnetic field

From N to S

Direction of a electrical field

The direction the positive charge would move.

Direction of a gravitational field

Towards centre of mass

Type of force for all 3

non-contact

What are all 3

invisible

Why do magnetic fields exist

Magnet with a N pole and a S pole.

Magnetic field lines have 5 properties what are they?

1) Continuous
2) Imaginary lines

3) Direction from n to s pole

4) Densest at the poles, that’s where strongest
5) Do not cross or touch

What is a permanent magnet surrounded by ?

A permanent magnet is surrounded by a magnetic field and has north pole and south pole.

How can a magnetic field around a bar be seen ?

The use of iron fillings and and a drawn diagram with field lines.