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3. (a) What is the electric field created by a proton at a distance of 0.1...

3. (a) What is the electric field created by a proton at a distance of 0.1 mm away from it? Note: the electric charge of a proton is e = 1.6 × 10−19 C. (b) Sketch the electric field lines for: Positive charge, Negative charge, Positive charge & Negative charge, Positive charge & Negative charge on rectangular bar.

4. An electric field, E = 5 N/C, crosses a square area at an angle, θ = 30◦ , as depicted in Fig. 1. What is the electric flux through the area?

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