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# problem_pdf - huang(jh45932 – Electric Force and Field...

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Unformatted text preview: huang (jh45932) – Electric Force and Field – hester – (APCE&M) 1 This print-out should have 17 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points 1) Two uncharged metal balls, X and Y , each stand on a glass rod and are touching. Y X 2) A third ball carrying a positive charge, is brought near the first two. Y X + 3) While the positions of these balls are fixed, ball X is connected to ground. Y X + 4) Then the ground wire is disconnected. Y X + 5) While X and Y remain in touch, the ball carring the positive charge is removed. Y X 6) Then ball X and Y are separated. Y X After these procedures, the signs of the charge q X on X and q Y on Y are 1. q X is positive and q Y is negative. 2. q X is negative and q Y is negative. 3. q X is neutral and q Y is positive. 4. q X is neutral and q Y is negative. 5. q X is negative and q Y is positive. 6. q X is positive and q Y is positive. 7. q X is negative and q Y is neutral. 8. q X is neutral and q Y is neutral. 9. q X is positive and q Y is neutral. 002 (part 1 of 3) 10.0 points Five equal negative point charges “ − q ” are placed symmetrically around a circle of radius R as shown. O y x R − q − q − q − q − q a b c d e Use a rough approximation to express the magnitude of the electric field vector E at a point on the positive x axis a distance 5 R from the center of the circle? 1. bardbl vector E bardbl ≈ 5 k e q R 2 2. bardbl vector E bardbl ≈ k e q 2 R 2 3. bardbl vector E bardbl ≈ 4. bardbl vector E bardbl ≈ k e q R huang (jh45932) – Electric Force and Field – hester – (APCE&M) 2 5. bardbl vector E bardbl ≈ k e q R 2 6. bardbl vector E bardbl ≈...
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problem_pdf - huang(jh45932 – Electric Force and Field...

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