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Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Bihar 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.
  • C
    The surface of a charged conductor is equipotential.
  • D
    Field lines due to a point charge are circular.
✓

Answer

  1. The surface of a charged conductor is equipotential.

Explanation:

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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