Rick Malloy
CPHY 122: ELECTRICITY AND MAGNET
SPRING SEMESTER 2019, Test
Due Monday February 11, 2019 by 9:00
Answer ALL questions and Show clearly your calculations for full
1. Consider three point charges located at the corners of a
triangle, as in Figure 23.6, where $q_1 = q_3 = 5 \mu C$, $q_2 =$
$-2 \mu C$ ($1 \mu C = 10^{-6} C$), and $a = 0.1 m$. Find the result-
ant force on $q_3$.
Find the magnitude and direction of the re
sultant force on $q_3$.
2. A charge $q_1 = 7 \mu C$ is located at $x = 0$ and $y = 0. Electric Field Due to Two Charges
