PHY 142 Midterm: P142 2008 Exam 1 solns
Document Summary
Please read the problems carefully and answer them in the space provided. Write on the back of the page, if necessary. Three charges (+q,-q, +q) are placed at the vertices of an equilateral triangle as shown in the figure. The force on +q due to the charges +q and q: points in the positive x direction, points in the negative x direction, points in the positive y direction, points in the negative y direction. is zero. Consider the potential across the plates of a parallel-plate capacitor. Four identical charges are moved in a uniform electric field on the paths shown in the figure. The dots represent the initial and the arrows the final positions of the charges. A wire has a linear charge density (x) = 2. 35x, where x is in meters and is in c/m. If the length of the wire is 3. 7 m, calculate the total charge on the wire.
