02 Lorentz Force (1)

02 Lorentz Force (1)#

Aim#

To show that a current in a magnetic field experiences a force.

Subjects#

  • 5H40 (Force on Current Wires)

Diagram#

../../../../../_images/figure_0209.png

Fig. 509 .#

Equipment#

  • Spiral filament lamp.

  • Safety connector to mains (\(220\mathrm{~V}/50\mathrm{~Hz}\)).

  • Bar magnet.

Presentation#

The lamp is connected to the mains and the filament is glowing. The filament can be seen clearly.

../../../../../_images/figure_1164.png

Fig. 510 .#

The bar magnet approaches the lamp and the individual turns of the spiral filament show themselves as broadened bands (see Figure 510). The filament performs a fast reciprocating motion

Explanation#

The reciprocating motion of the filament indicates that a force is acting and that it is acting to and fro.”To and fro” is caused by the constantly changing direction of the current ( \(50 \mathrm{~Hz}\) ).

Sources#

  • Biezeveld, H. and Mathot, L., Scoop, Natuurkunde voor de bovenbouw, part 4/5 vwo, pag. 200 and 210

  • Mansfield, M and O’Sullivan, C., Understanding physics, pag. 486-487

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