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(Figure 1) shows four charges at the corners of a square of side l

What magnitude and sign of charge Q will make the force on charge q zero?

Four point charges are at the corners of a square of side aa as shown in Figure P23.21.

• (a) Determine the magnitude and direction of the electric field at the location of charge q.
• (b) What is the resultant force on q?

Answer

(a) Determine the magnitude and direction of the electric field at the location of charge q

(b) What is the resultant force on q?

Last words

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