Phy102&05-s-ms2

Phy102&05-s-ms2 - Kuwait University Physics...

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0 Kuwait University Physics Department Physics 102 Second Summer Midterm Examination July 24, 2005 Time: 5:00 pm 6:45 pm Name ………………………………… Student No. …………… Instructors: Bhatia, Rakshani, Farhan, Lajko, Marafi, Razee & Sharma Fundamental constants k == × 1 4 9.0 10 N m / C o 92 2 πε (Coulomb constant) ε o = 8.85 × 10 -12 C 2 / (N · m 2 ) (Permittivity of free space) e = +1.60 × 10 -19 C (Elementary unit of charge) N A = 6.022 × 10 23 (Avogadro’s number) g = 9.8 m/s 2 (Acceleration due to gravity) 1 eV = 1.6 x 10 -19 J (Conversion from eV to J) 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 Prob. 1 2 3 4 5 6 7 8 9 10 Total M a r k s
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1 1. An isolated 50 nF air-filled parallel plate capacitor has 360 nC charge on its plates. A dielectric material ( κ = 2.6) is inserted filling half the space between the plates, as shown. The work don by an external agent to insert the dielectric is a. –576 nJ.
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Phy102&05-s-ms2 - Kuwait University Physics...

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