Monday, 23 June 2014 13:35

## K1-04: FORCE ON CURRENT IN MAGNETIC FIELD - PORTABLE

• ID Code: K1-04
• Purpose: Demonstrate the force on a current-carrying wire in a magnetic field.
• Description:
A wire is placed or held between the poles of a small horseshoe magnet. When the ends of the wire are connected to a 6-volt battery, the wire jumps out of the magnet. The current in the wire or the orientation of the magnet can be changed to investigate the directions of the vectors involved.
##### Engagement Suggestion
• Once students have seen what happens, encourage them to predict the results of reversing the direction of the flow of current. Then swap it around and show what happens. Have them discuss the results.
• What if you flip the magnet itself over? Again, have them predict what will happen, then try the experiment and discuss.
##### Background

This illustrates the Lorentz force, or Laplace force, as predicted by Maxwell’s equations. A current flowing through a magnetic field experiences a force determined by the cross product of the current vector and the magnetic field.

See demonstration K1-03 in this section for a larger version of this demonstration for classrooms.

• Availability: Available

• #### K1-03 FORCE ON CURRENT IN MAGNETIC FIELD

Demonstrates force on a current-carrying wire in a magnetic field Read More
• #### K1-04: FORCE ON CURRENT IN MAGNETIC FIELD - PORTABLE

Demonstrate the force on a current-carrying wire in a magnetic field Read More
• #### K1-05: FORCE BETWEEN CURRENT-CARRYING COILS

Demonstrate that current-carrying coils produce magnetic fields and interact like bar magnets Read More

• #### K1-11: CATHODE RAY TUBE - DEFLECTION BY CURRENT

Demonstrate visually the force between two parallel currents Read More
• #### K1-12 CATHODE-RAY TUBE - DEFLECTION BY MAGNET

Demonstrates the force on an electron beam by a magnetic field Read More
• #### K1-13: CATHODE RAY TUBE - DE LA RIVE MAGNETIC EFFECT

Illustrate bending of an electron beam in a magnetic field Read More
• #### K1-14 OSCILLOSCOPE CRT - DEFLECTION BY MAGNET

Demonstrates the force on an electron beam by a magnetic field Read More
• #### K1-15: OSCILLOSCOPE CRT - DEFLECTION BY ELECTRIC FIELD

Demonstrate the deflection of an electron beam by an electric field Read More
• #### K1-21 TORQUE ON CURRENT LOOP IN MAGNETIC FIELD

Demonstrates the torque on a current loop in a magnetic field Read More
• #### K1-22 TORQUE ON 500-TURN COIL IN MAGNETIC FIELD

Demonstrates the torque on a current loop in a magnetic field Read More
• #### K1-23: TORQUE ON CURRENT LOOP - MODEL

Model torque on a current loop due to magnetic field. Read More