Charges -q and +2q are located at x= +/- a. Determine the electric fields at poi
ID: 2224954 • Letter: C
Question
Charges -q and +2q are located at x= +/- a. Determine the electric fields at points 1 to 4. Write each field in component form for E1 E2 E3 and E4. Express your answer in terms of q, a, unit vectors i and j, and any appropriate constants.
+2q is located at -a and -q is located at a (both on the xaxis). Point 1 is at 2a on the yaxis. Point 2 is at -2a on the xaxis. Point 3is at 2a on the xaxis. Point 4 is at -2a on the yaxis.
An image is available on other questions like this on chegg, couldnt get mine to post.
Explanation / Answer
to find the electric field at any point for a given charge distribution
electric field due to Qi located ri away = KQi/ri along line joining point P and Qi
so total electric field at P = vector KQi/ri (decompose individual vectors into x,y components and then added respective x components and y components to get final vector)