2009-10-Sem1-Test1 - NATIONAL UNIVERSITY OF SINGAPORE PC1222 FUNDAMENTALS OF PHYSICS II TEST 1(Semester I AY 2009-10 28 September Time Allowed 1.5

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Unformatted text preview: NATIONAL UNIVERSITY OF SINGAPORE PC1222 FUNDAMENTALS OF PHYSICS II TEST 1 (Semester I: AY 2009-10, 28 September) Time Allowed: 1.5 Hours INSTRUCTIONS TO CANDIDATES 1. This test paper contains TWENTY-FIVE multiple-choice questions and comprises ELEVEN printed pages including the cover page. 2. Answer ALL questions on the Optical Reader Form. 3. For each question, select the correct answer A, B, C, or D by darkening the appropriate circle on the Optical Reader Form. Darken only ONE circle for each answer; darkening more than one circle will invalidate your answer. 4. All questions carry equal marks; marks will be deducted for wrong answers. 5. ONLY Optical Reader Form should be submitted at the end of the test. 6. This is a CLOSED book test. You are allowed however to bring in ONE help sheet no larger than A4 in size. Page 2 of 11 1. Topic: Electric Charge Difficulty: Level 1 A large negatively charged object is placed on an insulated table. A neutral metallic ball rolls straight toward the object but stops before it touches it. A second neutral metallic ball rolls along the path followed by the first ball, strikes the first ball and stops. The first ball rolls forward but does not touch the negative object. At no time does either ball touch the negative object. What is the final charge on each ball? (A) The first ball is negative and the second ball is positive. (B) The first ball is positive and the second ball is negative. (C) Both balls remain neutral. (D) Both balls are positive. 2. Topic: Electric Force Difficulty: Level 1 Two charged objects attract each other with a force F . What happens to the force between them if one charge is doubled, the other is tripled and the separation distance between their centers is reduced to one-fourth its original value? The force is now equal to (A) 16 F (B) 24 F (C) 3 F/ 8 (D) 96 F 3. Topic: Electric Field Difficulty: Level 1 Two point charges, separated by 1 . 5 cm, have charge values of +2 . μ C and- 4 . μ C, respectively. Suppose we determine that 10 field lines radiate out from the +2 . 0- μ C charge. If so, what might be inferred about the- 4 . 0- μ C charge with respect to field lines? (A) 20 radiate out (B) 5 radiate out (C) 20 radiate in (D) 10 radiate in PC1222 Fundamentals of Physics II Semester I, 2009/10 Page 3 of 11 4. Topic: Electric Field Difficulty: Level 3 A point charge Q =- 300 × 10- 9 C and two unknown point charges, q 1 and q 2 , are placed as shown. The electric field at the origin O, due to charges Q , q 1 and q 2 , is equal to zero....
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This note was uploaded on 11/30/2011 for the course EEE 1001 taught by Professor Phoon during the Spring '11 term at National University of Singapore.

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2009-10-Sem1-Test1 - NATIONAL UNIVERSITY OF SINGAPORE PC1222 FUNDAMENTALS OF PHYSICS II TEST 1(Semester I AY 2009-10 28 September Time Allowed 1.5

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