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CBSE 12th Standard Physics Subject Electrostatic Potential And Capacitance Ncert Exemplar 1 Mark Questions With Solution 2021

Published on: 23/05/2021

QB365 Provides the updated NCERT Exemplar Questions for Class 12, and also provide the detail solution for each and every case study questions. NCERT Exemplar questions are latest updated question pattern from NCERT, QB365 will helps to get more marks in Exams

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Std: 12th Standard CBSE - Physics

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Questions:

Generic 2

4 x 2 = 8

An electrostatic field line is continuous curve, i.e. a field line cannot have sudden breaks. Why not?

Why electrostatic field be normal to the surface at every point of a charged conductor?

The test charge used to measure electric field at a point should be vanishingly small.Why?

Does the coulomb force that one charge exerts on another charge changes, if other charge is brought nearly?

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Answers Key:

Generic 2

4 x 2 = 8

An electrostatic field line cannot be a discontinuous curve,i.e it cannot have breaks.If it has breaks,then it will indicate absence of electric field at the break points.But the electric field vanishes only at infinity.

For the condition of electrostatics,the electric field lines must be normal to the surface of the conductor,otherwise there would be a non-zero component of electric field along the surface of conductor and charges could not be at rest.

In case, test charges is not vanishingly small, it will produces its own electric field and the measured value of electric field will be different from the actual value of an electric field at that point.

Yes, it changes as the distance becomes less