Question

describe the experiment explaining the effect of a force acting on a current carrying small aluminium rod kept in the magnetic field​

Answer 1

Aim:

To demonstrate the effect of force on a current carrying small aluminium rod kept in the magnetic field.

Materials Required:

• Aluminium rod (connected to circuit)
• Horse-shoe magnet
• Flat table.

Experiment:

• The current carrying aluminium rod is kept inbetween the N-S poles of the horse-shoe magnet.

• It is made sure that the table is totally flat (inorder to exclude movements due to gravity).

Observation:

• The rod moves when the current is directed at some angle with the magnetic field.

Inference:

Magnetic Field Intensity exerts a force on current carrying wires (or rods), resulting in its movement.

Accompanying Expressions (Theory):

$\therefore \: \vec{F} = i ( \vec{L} \times \vec{B})$

$\implies \: | \vec{F}| = i \times L \times B \times \sin( \theta)$

• F is force
• i is current
• L is length of wire
• B is field intensity
• $\theta$ is angle between length vector and field vector.