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1. The force between two charges is 4×10−9N. If the magnitude of one charge reduced by...

1. The force between two charges is 4×10−9N. If the magnitude of one charge reduced by a factor of two and the distance between the charges is reduced by a factor of two, what is the new force between the charges?

2. What is the magnitude of the electric field from 20cm from a point charge of q=33nC?

3. What is the electric field 10cm from a 50-cm-radius metal sphere carrying −4.5×106C of charge?

4. Point charges are located at each corner of a square with sides of 5.0cm. The top-left q1=8.0nC charge is q2=4.0nC. The top-right charge is The bottom-right charge is q3=4.0nC The bottom-left charge is q4=8.0nCWhat is the electric field at the point midway between charges q2 and q3?

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