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Unformatted text preview: PHYSICS 1B QUIZ #2 FALL QUARTER 2006 A YOUR NAME _________________________________________________________________ YOUR IDENTIFICATION NUMBER______________________________________________ INSTRUCTIONS: THERE ARE 10 QUESTIONS ON THIS QUIZ. PLEASE FILL IN THE SCANTRON FORM USING A NUMBER 2 PENCIL. PUT YOUR NAME AND THE IDENTIFICATION NUMBER YOU WERE ASSIGNED IN THE SPACES ABOVE. ONE PAGE, FRONT AND BACK, OF NOTES AND A CALCULATOR ARE ALLOWED. NO CELL PHONES, LAPTOPS ETC ALLOWED. Note: Any confirmed case of cheating will result in an F grade in Physics 1B and referral to the dean for disciplinary action . 1. An electron (charge 1.6 10 19 C) moves on a path perpendicular to the direction of a uniform electric field of strength 3.0 N/C. How much work is done on the electron as it moves 15 cm? a. 4.8 10 20 J b. 4.8 10 20 J c. 1.6 10 20 J d. zero Work = Force * distance, where distance is parallel to the direction of the force. In this case, the motion is perpendicular to the direction of the electrostatic force, so no work is done. 2. Find the electrical potential at 0.15 m from a point charge of 6.0 C. ( k e = 8.99 10 9 N m 2 /C 2 ) a. 5.4 10 4 V b. 3.6 10 5 V c. 2.4 10 6 V d. 1.2 10 7 V Simply apply the expression for the potential of a point charge,...
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