# act01ans - PHYS-1200 PHYSICS II Class 1 Activity Review of...

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PHYSICS II SPRING 2005 Class 1 Activity: Review of Electrostatics ANSWERS 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. (Write the correct answer on your paper.) 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.) The electric field is a vector, and each charge produces a field at point P. The resultant field at P is the vector sum of those two fields. The fields due to the two charges cannot add to zero, because they are not directed along the same line. Turn the paper over. There is more on the back.

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## This note was uploaded on 09/17/2008 for the course PHYS 1200 taught by Professor Stoler during the Spring '06 term at Rensselaer Polytechnic Institute.

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act01ans - PHYS-1200 PHYSICS II Class 1 Activity Review of...

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