Introduction

In chapter 3, we have discussed about four different force fields. Magnetic force field is one of those force field exists in the universe. The Magnetostatic deals with the magnetic field. Electrical engineers are concerned about the magnetic field as much as electrical field. These two fields are associated with each other. Like electric field, magnetic field is also inverse square law field. We define different parameters of magnetic field which are analogous to electric field. These two fields are inter-related. Magnetic field plays a very important role to deliver electrical power to our useful mechanical system. This develops the importance to study both the electrical and magnetic field together. Electromagnetism is the branch of science and technology where we study the effects of magnetic field on the electric field and vice-versa. We have studied the alternating current in chapter 4. Any alternating current is associated with an alternating magnetic field. Alternating magnetic field again induces another electric field. In this chapter we shall study the properties and nature of magnetic field and also its connection to electric field. When an electric charge is in motion it produces the magnetic field.

Different Physical Parameters Related to Magnetic Field

Magnetic field

We have already defined the electric field and field intensity with respect to a positive unit electric charge. When an electric charge is in motion it creates a magnetic field. The magnetic field also exerts a force on the charge. So a charge Q with velocity V will experience force F both by the electric field B and magnetic field B. The combined force which will be acted upon the charge Q is known as Lorentz force.

We know the force experienced by charge Q in electric field Ē;.