Lorentz Force

The research that had been done by Oersted was continued by Lorentz, that investigated further about magnetic force around a wire carrying alectric current. This magnetic force is called Lorentz force. The magnitude of Lorentz force undergone by a wire carrying electric current depends on the following things.

1.     The electric current in the wire
2.     The length of wire influenced by the magnet
3.     Magnetic field strength
4.     The angle between current direction and magnetic field direction.

Lorentz force can be formulated:

F=B.I.l. sinθ 

In which:

F = Lorentz Force (newton)

B = Magnetic field strength (tesla)

I =Electric current (ampere)

l =Length of wire (meter)

θ = The angle between direction of electric current and magnetic field.

Example:

A conductor wire of 4 m in length and carrying electric current of 2 A lies in a constan magnetic field  of 10 T. If the angle between the magnetic field and electric current is 90o (perpendicular), calculate the Lorentz force undergone by the conductor wire!

Solution:

Given that: 
 

Reference:

Irawan, Etsa Indra dan Sunardi. 2008. Pelajaran IPA-Fisika Bilingual untuk SMP/MTs. Kelas IX. Bandung: CV.Yrama Widya.