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(II) A positive charge q is placed at the center of a circular ring of radius R. The ring carries a uniformly distributed negative charge of total magnitude −Q. (a) If the charge q is displaced from the center a small distance x as shown in Fig. 21–69, show that it will undergo
FIGURE 21–69
Problem 61.
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- (II) You are given two unknown point charges, Q1 and Q2 . At a point on the line joining them, one-third of the way from Q to Q2 , the electric field is zero (Fig. 16–59). What is the ratio Q1/Q2? E= 0 Qi 3 Q2 FIGURE 16–59 Problem 34. l-arrow_forward13. (II) Three positive particles of equal charge, +17.0 μC, are located at the cor- ners of an equilateral triangle of side 15.0 cm (Fig.21-55 ). Calculate the magnitude and direction of the net force on each particle due to the other two. Figure 21-55 +170 μC 15.0 cm 15.0 cm +170 μC 15.0 cm +170 μC Problem 130.arrow_forward(II) Three positive particles of equal charge, +17.0 µC, are located at the corners of an equilateral triangle of side 15.0 cm (Fig. 16–53). Calculate the magnitude and direction of the net force on each particle +17.0 µC due to the other two. FIGURE 16–53 Problem 12. +17.0 μC 15.0 cm +17.0 µC 15.0 cm 15.0 cmarrow_forward
- (12-15) Consider two concentric conducting spherical shells. Inner shell carries an excess charge of +2 µC and outer shell carries +2 µC. In the figure, the inner shell has an inner radius of 0.1 m and an outer radius of 0.2 m, and the outer shell has an inner radius of 0.38 m and an outer radius of 0.5 m. darrow_forward(II) A charge of 6.00 mC is placed at each corner of a square 0.100 m on a side. Determine the magnitude and direction of the force on each charge.arrow_forward(3) The purpose of this problem is to find the electric field of a ring of charge located in the x- z plane and has a diameter d. The ring has a total charge Q. To accomplish this, we will break the ring of charge into point charges. All answers should be given in terms given parameters and the coordinate 0. The field point, P, is located at (0, yo, 0). (a) What is the charge dq of the point charges? (b) What is the value of î for the point charges: (c) What are the bounds of integration to find the total electric field? (d) If instead of a full ring, we have half of a ring, which (if any) of your answers to parts (a) - (c) change? Which (if any) will stay the same?arrow_forward
- (III) The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in Fig. 16–39. Assume that the net average charge (due to electron sharing) indicated on H and N atoms has magnitude 0.2e and on the indicated C and O atoms is 0.4e. Assume also that atoms on each molecule are separated by 1.0 × 10-10 m. Estimate the net force between (a) a thymine and an adenine; and (b) a cytosine and a guanine. For each bond (red dots) consider only the three atoms in a line (two atoms on one mol- ecule, one atom on the other). (c) Estimate the total force for a DNA molecule containing 10° pairs of such molecules. Assume half are A-T pairs and half are C-G pairs.arrow_forwardA point charge (m = 1.0 gram) at the end of an insulating cord of length 55 cm is observed to be in equilibrium in a uniform horizontal electric field of 9500 N/C, when the pendulum's position is as shown in Fig. 16–66, with the charge 12 cm above the lowest (vertical) position. If the field points to the right in Fig. 16–66, determine the magnitude and sign of the point charge. l = 55 cm m -12 cm FIGURE 16-66 Problem 57.arrow_forward2) In figure, a solid dielectric sphere of radius a = 2 cm, whose center is at the origin of the coordinate system, is concentric with a spherical conductor shell of inner radius b = 4 cm and outer radius c = 5 cm. The dielectric sphere with & = 5 has net charge of Qi= +15 pC with uniform volume charge density. The conducting shell has total net charge of Q2 =-10 pC. The medium except conductor and dielectric is free-space. a) Sketch the free charge distributions on the figure by indicating relevant total charges and surfaces/volumes. b) Find the magnitude of electric field intensity at the regions of carrow_forwardarrow_back_iosSEE MORE QUESTIONSarrow_forward_ios
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