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Electrostatic Potential and Capacitance — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsElectrostatic Potential and Capacitance1 Mark
MCQ
An example of an equipotential surface in earth is:
  • A
    A line passing through the centre of the earth connecting two points along the diameter.
  • B
    A plane that passes through the circular section of the hemisphere of the earth.
  • ✓
    A spherical surface at a distance of 1km from the surface of the earth with its centre at centre of earth.
  • D
    A plane on the surface of the earth, which is a tangent to the earth.
✓

Answer

Correct option: C.
A spherical surface at a distance of 1km from the surface of the earth with its centre at centre of earth.
The potential is seen to be a constant on a sphere at all points.

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