2009-10-Sem2-Test1 - Page 1 of 10 NATIONAL UNIVERSITY OF...

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Page 1 of 10 Page 1 of 10 NATIONAL UNIVERSITY OF SINGAPORE PC1222 FUNDAMENTALS OF PHYSICS II TERM TEST 1 (Semester II: AY 2009-10, 5 March) Time Allowed: 1.5 Hours (2:15 pm – 3:45 pm) INSTRUCTIONS TO CANDIDATES 1. This test paper contains TWENTY-FIVE multiple-choice questions and comprises TEN 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, D or E 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; There is NO negative marking. 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.
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Page 2 of 10 Page 2 of 10 1. Which one of the following statements best explains why tiny bits of paper are attracted to a charged rubber rod? A) Paper is naturally a positive material. B) Paper is naturally a negative material. C) The paper becomes electrically polarized by induction. D) Rubber and paper always attract each other. E) The paper acquires a net positive charge by induction. 2. One mole of a substance contains 6.02 × 10 23 protons and an equal number of electrons. If the protons could somehow be separated from the electrons and placed in very small, individual containers separated by a million meters, what would be the magnitude of the electrostatic force exerted by one box on the other? A) 8.7 × 10 3 N B) 9.5 × 10 4 N C) 2.2 × 10 5 N D) 8.4 × 10 7 N E) 1.6 × 10 8 N 3. Four point charges, each of the same magnitude, with varying signs are arranged at the corners of a square as shown. Which of the arrows labeled A , B , C , and D gives the correct direction of the net force that acts on the charge at the upper right corner? A) A B) B C) C D) D E) The net force on that charge is zero.
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Page 3 of 10 Page 3 of 10 4. The figure shows the electric field lines in the vicinity of two point charges. Which one of the following statements concerning this situation is true? A) q 1 is negative and q 2 is positive. B) The magnitude of the ratio ( q 2 / q 1 ) is less than one. C)
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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-Sem2-Test1 - Page 1 of 10 NATIONAL UNIVERSITY OF...

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