# act01 - Do NOT write on these sheets or take them with you...

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Do NOT write on these sheets or take them with you! The next class needs them too! PHYS-1200 PHYSICS II FALL 2004 Class 1 Activity: Review of Electrostatics 1. The figure shows a small sphere that carries a positive charge of 1.0 ×10 -6 C. It produces an electric field at point P in the diagram. Is it possible to place a charge at point Q in the diagram, such that the electric fields produced at point P by the two charges will add to zero? The charge placed at Q can be of whatever sign and magnitude you choose. Yes, it is possible. No, it is not possible. If you chose yes , find the sign and magnitude of the necessary charge. Write your answer in the form shown below Q = ______________ _____ units If you circled no , briefly explain why it is not possible. (Use 25 words or less.) Turn the paper over. There is more on the back.

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2. The sketch shows two charged particles separated by 6.0 cm (6.0 ×10 -2 m). The particle on the left carries a charge of – 3.0 ×10 -7 C, and the one on the right + 2.0 ×10
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act01 - Do NOT write on these sheets or take them with you...

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