Question

(17) fig 3 shows 3 electric charges labeled q1, q2, q3 and some electric - field region surrounding the charges. what are the signs of the 3 charges? (a) q1 is positive, q2 is negative, q3 is positive. (b) q1 is negative, q2 is positive, q3 is negative. (c) all 3 charges are negative. (d) all 3 charges are positive.

Explanation:

Electric field lines start from positive charges and end at negative charges. By observing the direction of the electric - field lines around the charges in the figure (not shown here but based on the principle), we can determine the signs of the charges. If field lines are coming out of a charge, it is positive; if field lines are going into a charge, it is negative.

Answer:

(Without the actual figure, we cannot give a definite option. But the way to solve is to analyze the direction of electric - field lines around each charge. If you provide the figure, we can choose the correct option from A, B, C, D.)