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EQUIPOTENTIAL SURFACE and its PROPERTIES in HINDI
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=SN84xsB_Tjo
In this Physics video lecture in Hindi for class12 we explained equipotential surface and discussed on its few properties. Any surface, every point on which has same electrostatic potential, is called equipotential surface. • Following are the properties of equipotential surface. • (i) No two equipotential surfaces can intersect each other. • (ii) No work is done in moving a charge over an equipotential surface. • (iii) The electric field is always normal to the equipotential surface. • (i) Why don't two equipotential surfaces intersect each other? • Ans:- If two equipotential surfaces intersect each other, at the point of intersection there are two values of electric potential. As this fact is not true, it can be said that two equipotential surfaces do not intersect each other. • (ii) Why is no work done in moving a charge over an equipotential surface? • Ans:- We know that, W=q V • where, W is the work done in bringing a charge q from a point A to point B and V is the potential difference between point A and point B. • We know that the potential difference between any two points in an equipotential surface is zero. • Hence, W=q X 0 • or, W = 0 • Therefore, it can be said that no work is done in moving a charge over an equipotential surface. • (iii) Why is electric field always at right angles to an equipotential surface? • Ans:- We know that no work is to be done in moving a charge over an equipotential surface. If electric field had not been at right angles to the equipotential surface, the field would have had a component along the equipotential surface and hence, work has to be done in moving a charge over the equipotential surface. • So, it can be said that electric field is always at right angles to the equipotential surface. • Other related topics : • Electric potential energy : The electric potential energy of a charge at a point is defined as the amount of work done in bringing that charge from infinity to that point. • It is a scalar quantity . • In S.I., its unit is joule ( J ). • Electric potential : The electric potential at a point is defined as the amount of work done in bringing a unit positive charge from infinity to that point. • It is a scalar quantity . • In S.I., its unit is volt (V) or joule coulomb-1 (J C-1). • Electric potential difference : The electric potential difference between two points is defined as the amount of work done to bring a unit positive charge from one point to the another. • It is a scalar quantity . • In S.I., its unit is volt (V) or joule coulomb-1 (J C-1). • Additive nature of electric potential at a point : Let us consider that at point P the electric potentials due to charges q1, q2, q3, ….……, qn are V1, V2, V3, ……..., Vn respectively. • Then the total electric potential at point P is V = V1 + V2 + V3 +………..+ Vn • • ★★★★★★★★★★★★★★★★ • Click to visit the homepage of our channel : / @edupoint.physics • EduPoint by Arijit Daripa
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