A point charge with charge q1 =2.10 µC is held stationary at the origin. A second point charge with charge q2 = -4.10 µC moves from the point (0.165 m , 0) to the point ( 0.260 m , 0.250 m ). How much work W is done by the electric force on the moving point charge? 1 Express your answer in joules. Use k = 8.99x10° N · m² /C² for Coulomb's constant: k = • View Available Hint(s) ΑΣφ ? W = J

Three point charges, −4Q, −2Q, and +5Q, are shown in the figure where Q = 95 μC. The -4Q point charge is located in the center of the cube as shown, and two other charges are on the outside. (a) What is the electric flux through each face of the cube? face N•m²/C (b) What is the electric flux through the whole cube? cube N•m²/C +5Q (d) Gauss's law would to find the electric field on the surface of the cube because O you don't know the surface area of the cube O the electric field isn't uniform on its surface O the cube is ticklish and that would be funny (-4Q) (c) Moving the -4Q charge away from the center of the cube would change the electric flux through ... O each face of the cube O the whole cube O each face and the whole cube -2Q

ANS: 5) You use a voltmeter to measure potential difference from a very long wire carries a uniform linear charge density 2. The meter reads 450V when one probe of the meter is placed 4.5 cm from the wire and the other probe is 2.5 cm farther from the wire. What is 2? a) 9 x 107 C/m b) 9 x 10 C/m c) 2.5 x 10-7 C/m d) 2.5 x 10 C/m e) none of above ANS: