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DATA Positive charge Q is distributed uniformly around a very thin
Figure P21.94
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- This question checks that you can use the formula of the electric field due to a long, thin wire with charge on it. The field due to an infinitely long, thin wire with linear charge E = 12X Απερ η density is Imagine a long, thin wire with a constant charge per unit length of -2.3×10 C/m. What is the magnitude of the electric field at a point 10 cm from the wire (assuming that the point is much closer to the wire's nearest point than to either of its ends)? Give your answer in units of kN/C. -7arrow_forwardTwo parallel, thin, L×L conducting plates are separated by a distance d. Let L=1.7 m, and d=2.0 mm. A charge of +6.5μC is placed on one plate, and a charge of −6.5μC is placed on the other plate a. What is the magnitude of charge density on the inside surface of each plate, in coulombs per square meter? b. What is the magnitude of the electric field between the plates?arrow_forwardProblem Find the electric potential and the electric field at a point P located on the axis of a uniformly charged ring of radius a and total charge Q. The plane of the ring is chosen perpendicular to the x axis (Fig. 25.16). da Va? + a² Strategy Figure 25.16 helps us to visualize the source of the potential and conceptualize what the potential might look like. We expect the potential to be symmetric around the x axis and to decrease for increasing values of x. We categorize this problem as one involving a continuous distribution of charge on the ring rather than a collection of individual charges. Figure 25.16 A uniformly charged ring of radius a, whose plane is perpendicular to the x axis. All elements dq of the ring are at the same distance away from any point P on the x axis. Solution To analyze the problem, let us take P to be at a distance x from the center of the ring as in Figure 25.16. The charge element dq is at a distance equal to r = vx2 + a? from point P. Hence, using…arrow_forward
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