Question

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Explain the concept of electric fields.
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Answer 1

°°°°°An electric field can be used in the pictorial form to describe the overall intensity of the field around it. This pictorial representation is called the electric field lines. °°°°°°°

°°°°The concept of electric field was first proposed by Michael Faraday, in the 19th century. °°°°°

Properties of Electric Field Lines=====

✔✔✔Electric field lines start from a positive charge and end at a negative charge, in case of a single charge, electric field lines end at infinity

✔✔✔In a charge-free region, electric field lines are continuous and smooth

Two electric field lines never intersect or cross each other, as if they do, there will be two vectors depicting two directions of the same electric field, which is not possible

✔✔✔These lines never form a closed loop. This is because an electric field is conservative in nature and hence the lines don’t form a closed loop.

Answer 2

Electric field, an electric property associated with each point in space when charge is present in any form. The magnitude and direction of the electric field are expressed by the value of E, called electric field strength.The value of the electric field at a point in space, for example, equals the force that would be exerted

Instead of considering the electric force as a direct interaction of two electric charges at a distance from each other, one charge is considered the source of an electric field that extends outward into the surrounding space, and the force exerted on a second charge in this space is considered as a direct interaction between the electric field and the second charge. The strength of an electric field E at any point may be defined as the electric, or Coulomb, force F exerted per unit positive electric charge q at that point, or simply E = F/q. If the second, or test, charge is twice as great, the resultant force is doubled; but their quotient, the measure of the electric field E, remains the same at any given point. The strength of the electric field depends on the source charge, not on the test charge. Strictly speaking, the introduction of a small test charge, which itself has an electric field, slightly modifies the existing field. The electric field may be thought of as the force per unit positive charge that would be exerted before the field is disturbed by the presence of the test charge.