6.13

6.13 starter

Practical - the current balance

·         

Use a current balance to investigate what happens when a current flows in a magnetic field

·         How many magnetic fields are created by this apparatus?

·         How could you make the wire move further? (2 ways)

Answers

·         

How could you change the direction the wire moves in? (2 ways)

1.              2 magnetic fields:

a.                  the uniform magnetic field created between the poles of the permanent magnet

b.                  the magnetic field around the wire when the current flows

2.               

a.                  Increase the current in the wire

b.                  Increase the strength of the magnetic field

3.               

a.                  Reverse the poles of the magnets

b.                  Reverse the direction of the current

6.13

·         6.13 use the left hand rule to predict the direction of the resulting force when a wire carries a current perpendicular to a magnetic field

<<FLHR practice.pptm>>

6.13 FLHR simulation

Website:

http://www.walter-fendt.de/ph14e/lorentzforce.htm

Example:

http://maddog11physics.posterous.com/68-field-around-current-carrying-conductor-si-13208

6.13 Plenary

Magnetic fields interacting - Force on current carrying wire.swf Download this file

FLHR practice.pptm Download this file

FLHR Animation - Force on current carrying wire.swf Download this file