Question

1. the figure shows three electric charges labeled $q_1, q_2, q_3$, and some electric - field lines in the region surrounding the charges. what are the signs of the three charges? a) $q_1$ is positive, $q_2$ is negative, $q_3$ is positive b) $q_1$ is negative, $q_2$ is positive, $q_3$ is negative c) $q_1$ is positive, $q_2$ is positive, $q_3$ is negative d) all three charges are negative e) all three charges are positive

Explanation:

Step1: Recall electric - field line properties

Electric field lines start from positive charges and end on negative charges.

Step2: Analyze the field - line directions

For \(Q_1\), the electric - field lines are starting from it, so \(Q_1\) is positive. For \(Q_2\), the electric - field lines are ending on it, so \(Q_2\) is negative. For \(Q_3\), the electric - field lines are starting from it, so \(Q_3\) is positive.

Answer:

A. \(Q_1\) is positive, \(Q_2\) is negative, \(Q_3\) is positive