Electric Field
What is Electric field ?
It is found that in the medium around a charge a force acts on a positive or negative charge when placed in that medium. If the charge is sufficiently large, then it may create such a huge stress as to cause the electrical rupture of the medium, followed by the passage of an arc discharge.
The stress is represented by imaginary lines of forces. The direction of the lines of force at any point is the direction along which a unit positive charge placed at that point would move if free to do so. It was suggested by Faraday that the electric field should be imagined to be divided into tubes of force containing a fixed number of lines of force. He assumed these tubes to the elastic and having the property of contracting longitudinally the repelling laterally. With the help of these properties, it becomes easy to explain (i) why unlike charges attract each other and try to come nearer to each other
and (ii) why like charges repel each other [Figure given below].
it is more common to use the term lines of force. These lines are supposed to emanate from a positive charge and end on a negative charge [Figure given below]. These lines always leave or enter a conducting surface normally
What is electric field formula ?
Electric field can be considered as an electric property associated with each point in the space where a charge is present in any form. An electric field is also described as the electric force per unit charge. The formula of electric field is given as;
E = F /Q.
What are the type of electric field ?
The electric field is mainly classified into two types. They are the uniform electric field and the nonuniform electric field.
Read article – Units of Resistivity
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