5. A thin semicircular rod like the one in problem 4 is broken into two halves. The top half has a total charge +Q uniformly distributed along it, and the bottom half has a total charge -Q uniformly distributed along it. On the diagram, indicate the direction of the net electric force on a positive test charge placed in turn at points A, B, and C. Explain how you determined your answers. 6. A positive point charge +q is placed near an uncharged metal rod. a. Sketch the charge distribution on the rod. b. Is there a non-zero net electric force on the rod? Explain.
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The top half has a positive charge +Q uniformly distributed, and the bottom half has a negative charge -Q uniformly distributed. We need to determine the direction of the net electric force on a positive test charge placed at points A, B, and C. We also need to Show more…
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Mark J.
A thin semicircular rod has a total charge +Q uniformly distributed along it. A negative point charge -Q is placed as shown, and a test charge +q is placed at point C. (Point C is equidistant from -Q and from all points on the rod.) Let Fp and Fr represent the force on the test charge due to the point charge and the rod respectively. Is the magnitude of Fp greater than, less than, or equal to the magnitude of Fr? Explain how you can tell. Is the magnitude of the net force on +q greater than, less than, or equal to the magnitude of Fp? Explain. A second negative point charge -Q is placed as shown. Is the magnitude of the net electric force on +q greater than, less than, or equal to the magnitude of the net electric force on +q in part b? Explain.
A thin semicircular rod has a total charge +Q uniformly distributed along it. A negative point charge -Q is placed as shown. A test charge +q is placed at point C. Let FP and FR represent the force on the test charge due to the point charge and the rod respectively. a. Is the magnitude of FP greater than, less than, or equal to the magnitude of FR? Explain how you can tell. b. Is the magnitude of the net force on +q greater than, less than or equal to the magnitude of FP? Explain.
Mehal M.
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