A charge +q is located at the origin. A charge -2q is at 3.65 m on the x axis. (

Question

A charge +q is located at the origin. A charge -2q is at 3.65 m on the x axis.
(a) For what finite value of x is the electric field zero?
5 . m
Sketch a diagram of the situation and consider the direction of each given field direction at points between x = 0 and x = 3.65 m. Do the same for negative values of x and for x > 3.65 to decide where the two field contributions can cancel to produce zero net field. The response you submitted has the wrong sign.
(b) For what finite value(s) of x is the electric potential zero? smaller value 6 . m
Write an expression for the potential as a function of x to the left of both charges, between the two charges, and to the right of both charges. Solve for the value(s) of x for which the potential is zero. The response you submitted has the wrong sign.
larger value 7 . m

Explanation / Answer

a) let point be x then 1/(x^2) = 2/(3.65+x)^2 so coordinates of point = (-8.81 ,0) b) 1/x = 2/(3.65 - x) x = (1.216,0)

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