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Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectrostatic Potential and Capacitance1 Mark
MCQ
Which of the following statements is correct?
  • A
    An electric field is a scalar quantity.
  • B
    Electric field lines are at $45$ degrees to the equipotential surfaces.
  • ✓
    The surface of a charged conductor is equipotential.
  • D
    Field lines due to a point charge are circular.
✓

Answer

Correct option: C.
The surface of a charged conductor is equipotential.

In conductors, charges are equally distributed over the surface of the conductor. Therefore the potential throughout the surface is the same, i.e. equipotential. The electric field is a vector quantity and the field lines cut the equipotential surfaces at $90$ degrees. The field lines due to a point charge are radial.

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