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Chapter 22: Q. 42 (page 625)
What is the force on the charge in FIGURE P? Give your answer as a magnitude and an angle measured cw or ccw (specify which) from the-axis.
The value of force is and the angle is.
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A plastic rod that has been charged to -15 nC touches a metal sphere. Afterward, the rod鈥檚 charge is -10 nC.
a. What kind of charged particle was transferred between the rod and the sphere, and in which direction? That is, did it move from the rod to the sphere or from the sphere to the rod?
b. How many charged particles were transferred?
The electric field 2.0 cm from a small object points away from the object with a strength of 270,000 N/C. What is the object鈥檚 charge?
Two neutral metal spheres on wood stands are touching. A negatively charged rod is held directly above the top of the left sphere, not quite touching it. While the rod is there, the right sphere is moved so that the spheres no longer touch. Then the rod is withdrawn. Afterward, what is the charge state of each sphere? Use charge diagrams to explain your answer.
A 2.0 g plastic bead charged to -4.0 nC and a 4.0 g glass bead charged to +8.0 nC are 2.0 cm apart and free to move. What are the accelerations of
(a) the plastic bead and
(b) the glass bead?
Two 1.0 kg masses are 1.0 m apart (center to center) on a frictionless table. Each has +10 mC of charge.
a. What is the magnitude of the electric force on one of the masses?
b. What is the initial acceleration of this mass if it is released and allowed to move?
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