# College Physics

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The point charges in Figure 17.41 are located at the corners of an equilateral triangle 25.0 cm on a side, where qb = +12.0 µC and qc = -4.50 µC. (Assume that the +x-axis is directed to the right.)

(a) Find the electric field at the location of qa.
Magnitude
? N/C
Direction
? ° (counterclockwise from the +x-axis)

(b) What is the force on qa, given that qa = +1.50 nC?
Magnitude
? N
Direction
? ° (counterclockwise from the +x-axis)

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