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Unformatted text preview: PROBLEMS: P21-3) What is the magnitude of the electric force of attraction between an iron nucleus (q=+26e) and its innermost electron if the distance between them is 1.5 x 10-12 m? P21-14) At each corner of a square of side l there are point charges of magnitude Q, 2Q, 3Q, and 4Q (Fig. 21-49). Determine the force on each charge due to the other three charges. P21-33) Draw, approximately, the electric field lines emanating from a uniformly charged straight wire whose length l is not great. The spacing between lines near the wire should be somewhat less than l. [Hint: Also consider points very far from the wire.] P21-37) Use Coulombs law to determine the magnitude and direction of the electric field at points A and B in Fig. 21-52 due to the two positive charges (Q = 7.0 m C) shown. Is your result consistent with Fig. 21-33b?...
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This note was uploaded on 04/07/2008 for the course PHY 113 taught by Professor Jordan during the Spring '08 term at Rochester.
- Spring '08