Which of the following is true?
(A) The equilibrium of a charged particle under the action of coulomb force alone can never be stable.
(B) A hollow metal sphere placed on an insulating stand is charged positively. The electric potential inside is same as on surface
(C) A free electron and a free proton are placed in a uniform field, both will experience same magnitude of the force
(D) A free electron and a free proton are placed in a uniform field, both will experience same acceleration
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A), (B) and (C) Only
(A) for a single charged particle in isolation, the equilibrium is unstable as it will experience a net force in direction of electric field. (Assuming +ve charge)
(B) In electrostatic, the electric potential inside a conductor (including a metal hollow sphere) is uniform and equal to the potential on the surface.
(C) A free electron and a free proton are placed in a uniform model, both will experience the same magnitude of force but though in opposite direction.
(D) This statement is false because mass of electron ≠ mass of proton and hence, acceleration will be different.