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Chapter 22: Q. 29 - Excercises And Problems (page 625)
What magnitude charge creates a 1.0 N/C electric field at a point 1.0 m away?
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Four lightweight balls are suspended by threads. Ball has been touched by a plastic rod that was rubbed with wool. When the balls are brought close together, without touching, the following observations are made:
鈥� Balls are attracted to ball
鈥� Balls have no effect on each other.
鈥� Ball is attracted to ball
What are the charge states (glass, plastic, or neutral) of balls ? Explain.
The two oppositely charged metal spheres in FIGURE have equal quantities of charge. They are brought into contact with a neutral metal rod. What is the final charge state of each sphere and of the rod? Use both charge diagrams and words to explain.
Two positive point charges q and 4q are at x = 0 and x = L, respectively, and free to move. A third charge is placed so that the entire three-charge system is in static equilibrium. What are the magnitude, sign, and x-coordinate of the third charge?
A +12 nC charge is located at the origin.
a. What are the electric fields at the positions (x, y) = (5.0 cm, 0 cm), (-5.0 cm, 5.0 cm), and (-5.0 cm, -5.0 cm)? Write each electric field vector in component form.
b. Draw a field diagram showing the electric field vectors at these points.
FIGURE shows four charges at the corners of a square of side . What is the magnitude of the net force on?
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