Metal sphere A is initially neutral. It is connected by a metal wire to the grou

Question

Metal sphere A is initially neutral. It is connected by a metal wire to the ground. A positively changed rod is thought near but not touching. Is A new positive, negative or neutral? Which of the following statements is wrong regarding the properties about conductors in electrostatic equilibrium? A) Any excess charge is on the surface B) The electric field inside is zero. C) The exterior electric field is perpendicular to the surface. D) The field strength is smallest at sharp E) The entire conductor is at the same potential, and thus the surface is an equipotential

Explanation / Answer

a) applying junction rule,

I in= Iout

2+ x= 5+9

I in fourth wire = 12 A

Q.9 positive

Q.10 option D

b)

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