You stand at location \( A \), a distance \( d \) from the origin, and hold a small charged ball. You find that the electric force on the ball is 0.056 N . You move to location \( B \), a distance \( 2 d \) from the origin, and find the electric force on the ball to be 0.028 N . What object located at the origin might be the source of the field? (Select all that apply.)
(a)a point charge
(b)a dipole
(c)a uniformly charged rod (for \( d \ll L \) )
(d)a uniformly charged ring (for \( d \ll R \) )
(e)a uniformly charged disk (for \( d \ll R \) )
(f)a uniformly charged hollow sphere
(g)none of the above
If the force at \( B \) were 0.0559 N , what would be your answer? (Select all that apply.)
(a)a point charge
(b)a dipole
(c)a uniformly charged rod (for \( d \ll L \) )
(d)a uniformly charged ring (for \( d \ll R \) )
(e)a uniformly charged disk (for \( d \ll R \) )
(f)a uniformly charged hollow sphere
(g)none of the above
If the force at \( B \) were 0.112 N , what would be your answer?
(Select all that apply.)
(a)a point charge
(b)a dipole
(c)a uniformly charged rod (for \( d \ll L \) )
(d)a uniformly charged ring (for \( d \ll R \) )
(e)a uniformly charged disk (for \( d \ll R \) )
(f)a uniformly charged hollow sphere
(g)none of the above
If the force at \( B \) were 0.014 N , what would be your answer? (Select all that apply.)
(a)a point charge
(b)a dipole
(c)a uniformly charged rod (for \( d \ll L \) )
(d)a uniformly charged ring (for \( d \ll R \) )
(e)a uniformly charged disk (for \( d \ll R \) )
(f)a uniformly charged hollow sphere
(g)none of the above