Phy102&09-II-ms1

Phy102&09-II-ms1 - Kuwait University Physics...

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Unformatted text preview: Kuwait University Physics Department Physics 102 First Midterm Exam Second Semester (2008-2009) April 16, 2009 (6.00- 7:30 p.m.) Name: ………………………… Student No: ……………….. Instructors: Drs. Abel Karim, Afrousheh, Davis, Kokaj, Marafi, Rakhshani, Ramadan, Razee, and Sharma (Fundamental constants ) k = 2 2 9 C / m . N 10 . 9 4 1 × = πε ο (Coulomb constant) ε o = 8.85 × 10-12 C 2 / (N · m 2 ) (Permittivity of free space) μ = 4 π × 10-7 T .m/A (Premeability of free space) e = 1.60 × 10-19 C (Elementary unit of charge) N A = 6.02 × 10 23 (Avogadro’s number) g = 9.8 m/s 2 (Acceleration due to gravity) m e = 9.11 × 10-31 kg (Electron mass) m p = 1.67 × 10-27 kg (Proton mass) Prefixes of units m = 10-3 μ = 10-6 n = 10-9 p = 10-12 k = 10 3 M = 10 6 G = 10 9 T = 10 12 For use by Instructors only Problem 1 2 3 4 5 6 7 8 Total Marks Question 1 2 3 4 5 6 7 8 Total Marks Part I: Solve the following problems 1. Three charges are located in the x-y plane as shown in the figure. What is the magnitude of the resultant force on the charge +q = 1 nC ? [3 points] ( ) ( ) ( ) [ ] [ ] [ ] N F N j i F F F N j i j i q q k F N i i q q k F 5 6 5 2 1 6 6 2 2 5 2 1 10 67 . 1 ˆ 10 76 . 5 ˆ 10 568 . 1 ˆ 10 76 . 5 ˆ 10 32 . 4 ˆ 8 . ˆ 6 . 05 . 2 . ˆ 10 . 2 ˆ 03 . 2 . − − − − − − × = × − × = + = × − × − = − − − = × = = r r r r r 2. A point charge (q = −1 mC and mass m = 2 × 10 −6 kg) moving with a velocity v = 2.0 ×10 3 m/s enters the region between two oppositely charged parallel plates through a hole in the positive plate. If the plates are 0.10 m apart and the charge through a hole in the positive plate....
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Phy102&09-II-ms1 - Kuwait University Physics...

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