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Chapter 22: Q5P (page 653)
A charged particle produces an electric field with a magnitude ofat a point that isaway from the particle. What is the magnitude of the particle鈥檚 charge?
The magnitude of the particle鈥檚 charge is
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In Fig. 22-51, two curved plastic rods, one of charge +qand the other of charge-q, form a circle of radius R=8.50 cm in an x-yplane. The xaxis passes through both of the connecting points, and the charge is distributed uniformly on both rods. If q=15.0 pC, what are the (a) magnitude and (b) direction (relative to the positive direction of the xaxis) of the electric field Eproduced at P, the center of the circle?
Figure 22-23 shows two square arrays of charged particles. The squares, which are centered on point P, are misaligned. The particles are separated by either dor d/2 along the perimeters of the squares. What are the magnitude and direction of the net electric field at P?
In Fig. 22-29, an electron e travels through a small hole in plate A and then toward plate B. A uniform electric field in the region between the plates then slows the electron without deflecting it. (a) What is the direction of the field? (b) Four other particles similarly travel through small holes in either plate Aor plate Band then into the region between the plates. Three have charges
,
, and.The fourth (labeled n) is a neutron, which is electrically neutral. Does the speed of each of those four other particles increase, decrease, or remain the same in the region between the plates?
An electric dipole with dipole momentis in an electric field(a) What is the potentialenergy of the electric dipole? (b) What is the torque acting on it?(c) If an external agent turns the dipole until its electric dipole moment ishow much work is done by the agent?
Find an expression for the oscillation frequency of an electric dipole of dipole momentand rotational inertia Ifor small amplitudes of oscillation about its equilibrium position in a uniform electric field of magnitude E.
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