Question

(20 pts total) The diagram shows the electric fieldlines for a system of three point charges, indicated by the circles numbered 1, 2, and 3. 6. a. (5pts) Which point charge(s) is/are positive? b, (5pts) which point charge has more charge, #2 or #3? c. (5pts) Which spot has a larger magnitude electric field, A or B? (5pts) On the drawing, draw a closed gaussian surfce which has negative electric flux.r) d.

Answer 1

Key points field lines start from the +ve charge and ends on negatively charge. Electric `field strength directlyproportionalto no of field lines (a): - according to key point (1) the charges (1) and (3) are +ve (b): - charge (2) has more charge because no of lines coming toward it, is more. (c): - point A has larger magnitude of electric field because of field lines. But at B there is no field lines. (d): - electric flux implies phi_x = E^rightarrow A^rightarrow implies EA cos phi if theta = 180 degree implies phi_E = -ve the Gaussian surface is drawn in figure.