Loading

Module 1: Magnets and magnetism

Notes
Study Reminders
Support
Text Version

Set your study reminders

We will email you at these times to remind you to study.
  • Monday

    -

    7am

    +

    Tuesday

    -

    7am

    +

    Wednesday

    -

    7am

    +

    Thursday

    -

    7am

    +

    Friday

    -

    7am

    +

    Saturday

    -

    7am

    +

    Sunday

    -

    7am

    +

XSIQ
*

Physics - Magnetic fields

Magnetic fields

The term 'field' [1]is used to describe a region where an entering item
may experience a force. Magnetic fields are regions where magnetic
materials will experience a force in a particular direction. Magnetic field
strength is measured in tesla. However, most magnetic fields are more
appropriately measured in milli-tesla. The symbol for magnetic field
strength is B. There are strict conventions regarding the drawing of
magnetic fields.

* magnetic field lines show the direction of the force exerted on an
isolated north pole

* the proximity of the field lines indicates the relative strength of the
field. Sparse lines represent weak fields. Dense lines represent strong
fields

* the direction of the force on an isolated north pole is given by the
tangent to the field line at any point

* crosses are used to show magnetic field lines going into the page

* dots are used to show magnetic field lines coming out of the page

Since magnetic field lines show the direction that an isolated north pole
would be forced to move, they always run from the north pole of a magnet to
its south pole. Familiarise yourself with the structure of common magnetic
fields such as bar magnets.

Previous | Next

Links:
------
[1] http://alison.com/#