Discussion
Consider the following statements about conductors in electrostatics.
1. The interior field is zero 2. Charge resides on the surface 3. The surface field is tangential to the surface
Answer: C
Correct answer: 1 and 2 only are correct
Statements 1 and 2 are correct: any interior field would drive charge until it vanished, so the charge ends up on the surface. Statement 3 has the direction wrong - the surface field is normal to the surface, since any tangential component would move charge along it and the arrangement would not be in equilibrium.
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