Physics 196 Fall 2010 Midterm _1 Practice Test

# Physics 196 Fall 2010 Midterm _1 Practice Test - Name Class...

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Unformatted text preview: Name: Class: Date: 1]): A Physics 196 Fall 2010 Midterm #1 Practice Exam Multiple Choice Identify the choice that best completes the statement or answers the question. 1. [fa = 3.0 mm, b = 4.0 mm, Q] = 60 nC, Q2 = 80 nC, and q = 24 nC in the ﬁgure, what is the magnitude of the total electric force on g? ‘l a. 2.? N b. 1.9 N c. 2.3 N d. 1.5 N e. 0.52 N 2. A uniform linear charge of 3.0 nCtm is distributed along the y axis from y = —3 m to y = 2m. Which of the following integrals is correct for the magnitude of the electric ﬁeld at y = 4 m on the y axis? [2 27dy a‘ —3(4—y)2 b 1‘2 27d); ' —316+y2 J'Z l35dy C' —s(4—y)" d [2 l35dy ‘ —316+y2 e. none of these 3. Which one of the diagrams below is not a possible electric ﬁeld conﬁguration for a region of space which does not contain any charges? .II..§.§.§ Name: 1]):A . Charge of uniform surface density (4.0 anml) is distributed on a spherical surface (radius = 2.0 cm). What is the total electric ﬂux through a concentric spherical surface with a radius of 4.0' cm? a. 2.8 N - mzr'C b. 1.7 N - mza’C c. 2.3 N - [11sz d. 4.0 N - mzr'C e. 9.1 N - mzr'C . A long nonconducting cylinder (radius = 12 cm) has a charge of uniform density (5.0 nClm3) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the axis of the cylinder. a. 20 MC b. 2? NC c. 16 NC (:1. 12 NC e. 54 NC . A charge of 8.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm), and a second charge of —3.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm). Determine the magnitude of the electric field 5.0 cm from the center of the two surfaces. a. 14 NfC b. 11 NC c. 22 NIC d. 18 NIC e. 40 NI'C . An astronaut is in an all-metal chamber outside the space station when a solar storm results in the deposit of a large positive charge on the station. Which statement is correct? a. The astronaut must abandon the chamber immediately to avoid being electrocuted. b. The astronaut will be safe only if she is wearing a spacesuit made of non-conducting materials. c. The astronaut does not need to worry: the charge will remain on the outside surface. d. The astronaut must abandon the chamber if the electric field on the outside surface becomes greater than the breakdown ﬁeld of air. e. The astronaut must abandon the chamber immediately because the electric ﬁeld inside the chamber is non-uniform. . Three identical point charges (+2.0 nC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. If the electric potential is taken to be zero at inﬁnity, what is the potential at the midpoint of any one of the sides of the triangle? a. 16 V b. 10 V c. 70 V d. 46 V e. 44 V Name: ID: A 9. Identical point charges (+20 pC) are placed at the corners of an equilateral triangle with sides of 2.0-m length. How much external energy is required to bring a charge of 45 ,qu from inﬁnity to the midpoint of one side of the triangle? a 26 J b. 16 J c. 23 J d 21 J e 12 J 10. Two large parallel conducting plates are 8.0 cm apart and carry equal but opposite charges on their facing surfaces. The magnitude of the surface charge density on either of the facing surfaces is 2.0 anm3. Determine the magnitude of the electric potential difference between the plates. a. 36 V b. 27V c. 18 V d 45 V e 16V 11. What is the equivalent capacitance of the combination shown? iﬂlw ._| 2913‘ 12313 a 29 ,uF b. 10 yF c. 40 pF d 25 yF e 6.0 ,uF 12. How much energy is stored in the SO-ﬂF capacitor when Va — Vb = 22V? ﬁ._| 259.? 5433!? Z! -—| 25 11.1:- a. 0.?8 ml b. 0.58 m] c. 0.68 m] d. 0.48 m] e. 0.22 m! Physics 196 Fall 2010 Midterm #1 Practice Exam Answer Section MULTIPLE CHOICE 1. ANS: D PTS: 1 2. ANS: A PTS: 1 3. ANS: D PTS: 1 4. ANS: C PTS: 1 5. ANS: B PTS: 1 6. ANS: D PTS: 1 Tr'. ANS: C PTS: 1 8. ANS: D PTS: 1 9. ANS: D- PTS: 1 10. ANS: C PTS: 1 ll ANS: B PTS: 1 12 ANS: D PTS: 1 1]): ...
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