Which of the following is not necessarily true regarding a isolated charged cond

Question

Which of the following is not necessarily true regarding a isolated charged conductor that is in electrostatic equilibrium? The excess charge is uniformly distributed. The excess charge is on the conductor's surface The magnitude of the electric field anywhere within the conductor's interior is 0. Free electrons abound within the conductor It is measured that the work done by an electric field, say E, in displacing a particle of charge +q from point A to point B is W =-7J. Which of the following is not necessarily true? E and AB vector are antiparallel. U_B - U_A = 7J V_B - V_A > 0. The force due to the electric field is actually trying to "push" the particle from point B to point A.

Explanation / Answer

5. option A is to be selected because excess charge resides on conductor surface and inside there is not excess charge. others options are necessarily true.

6. options B and C are necessarily true as work done by electric field is negative so potential energy and potential must increase from A to B

option A is not neccessarily true because AB can be at some angle with E like 160 or 170.

similarly option D is not necessarily true

so option A is to be selected but multiple options are true then both A and D selected

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