A net charge of +10 C is placed on a spherical conducting shell. A charge of -3

Question

A net charge of +10 C is placed on a spherical conducting shell. A charge of -3 C is suspended inside the cavity of the spherical conducting shell. The charge in Coulomb on the outer surface of the shell is -7 -3 0 +3 +7 Which one of the following statements is not true regarding a solid conductor (of any shape) that has reached electrostatic equilibrium? E = 0 inside the conductor |sigma| is always constant at various locations on the surface of the conductor E is perpendicular to the surface of the conductor at any particular location Delta V = 0 between any two points on the surface of the conductor Delta V = 0 between any two points inside the conductor Which of the following statements is true regarding an insulator? E can never equal zero inside an insulator E will always equal zero inside an insulator rho will always be constant inside an insulator sigma will always be constant on the surface of an insulator none of the above Which one of the following statements regarding the relationship between E and V is true? if E = 0 at a point in space, then V = 0 at that point if V = 0 at a point in space, then E = 0 at that point if E = 0 in a region in space, then V = 0 in that region if V is constant in a region in space, then E = 0 in that region of space none of the above Which the following statements regarding Delta V (produced by an electrostatic field E) is true? Delta V is positive (V increases) when "moving" in the direction of E Delta V is positive (V increases) when "moving" perpendicular to the direction of E Delta V between two separate points sometimes depends on the path between the points Delta V between two separate points always depends on the path between the points Delta V between two separate points is independent of the path between the points

Explanation / Answer

10)

inner surface get charged with -3C and outer surface get 10-3 = 7 C

so the correct choice is E) +7

11) since that solid conductor is of any shape hence

B) is true

12) in case of insulator

A) E can never equal zero inside an insulator

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