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College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300

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BuyFindarrow_forward

College Physics

11th Edition
Raymond A. Serway + 1 other
ISBN: 9781305952300
Textbook Problem

Four point charges are located at the corners of a square. Each charge has magnitude 3.20 nC and the square has sides of length 2.00 cm. Find the magnitude of the electric field at the center of the square if (a) all of the charges are positive and (b) three of the charges are positive and one is negative.

(a)

To determine
The electric field at the centre of the square when all the charges are positive.

Explanation

By symmetry, the electric fields due to all the charges get cancelled. Therefore, the net electric field is zero...

(b)

To determine
The electric field at the centre of the square when three charges are positive and one is negative.

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