School of Physics Lecture Demonstration Manual

Ea-1 Force on a Current Carrying Conductor in a Magnetic Field

Published: Tuesday 14 March 2006 - Updated: Tuesday 29 March 2011

Aim

To demonstrate that a current carrying conductor in a magnetic field experiences a force given by dF= I dl X B

Apparatus

Diagrams

Click on pictures to enlarge.

Force on Current Carrying Wire in B Field

Force on Wire Diagram

Videos

Force on a Current Carrying Wire in B Field

Description

The aluminium strip is hung between the poles of the magnet with the aid of the two retort stands as shown. On closing the switch S1 the strip experiences a force due to the interaction between the current I and the magnetic field B.

The direction of current flow may be reversed via the rotary switch S2 to deflect the strip in the opposite direction.

Safety notes

Electrical safety 

Maintenance 

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