A charge q=4 10$^{-9}$ C is in the field generated by a charge Q=6 10$^{-8}S C. What is the work required to move q from a distance o f 3m to a distance of 0.5m from Q? Choose one or more alternatives: ☐ (a) 3.6 10^-7 J ☐ (b) 5.4 10^-7 J ☐ (c) 3.6 10^-6 J ☐ (d) 5.4 10^-6 J
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A: ∆EK=Ui-Uf=kqQri-kqQrf=kqQ1ri-1rf=9×109 NC5.5×10-6 C49.1×10-6 C119.3×10-2 m-119.3+95.1×10-2 m=10.47 J
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Q: he amount of work required
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A: Given Quantities:
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