All of the following describe the field around a charged body except*1 pointThe excess charge lies only at the surface of the conductorThe electric field is zero within and outside the solid part of the conductorThe electric field at the surface of the conductor is perpendicular to the surfaceThe field is strongest on sharp points of an irregularly shaped conductor
Question
All of the following describe the field around a charged body except*1 pointThe excess charge lies only at the surface of the conductorThe electric field is zero within and outside the solid part of the conductorThe electric field at the surface of the conductor is perpendicular to the surfaceThe field is strongest on sharp points of an irregularly shaped conductor
Solution
The statement that does not correctly describe the field around a charged body is: "The electric field is zero within and outside the solid part of the conductor."
Here's why:
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"The excess charge lies only at the surface of the conductor" - This is true. In a conductor, excess charge resides on the surface and not within the body of the conductor.
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"The electric field is zero within and outside the solid part of the conductor" - This is false. The electric field is indeed zero within a conductor (in electrostatic equilibrium), but not outside. Outside the conductor, the field lines originate or terminate on the charges present on the surface of the conductor.
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"The electric field at the surface of the conductor is perpendicular to the surface" - This is true. The electric field at the surface of a conductor is always perpendicular to the surface, because any component of the field parallel to the surface would cause the charges to move, disrupting the electrostatic equilibrium.
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"The field is strongest on sharp points of an irregularly shaped conductor" - This is true. The electric field is strongest at sharp points or corners because the charge density is highest at these points. This is why lightning rods are pointed.
Similar Questions
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