Exam 4: Capacitance
Exam 1: The Electric Field I: Discrete Charge Distributions87 Questions
Exam 2: The Electric Field II: Continuous Charge Distributions75 Questions
Exam 3: Electric Potential108 Questions
Exam 4: Capacitance73 Questions
Exam 5: Electric Current and Direct-Current Circuits160 Questions
Exam 6: The Magnetic Field71 Questions
Exam 7: Sources of the Magnetic Field115 Questions
Exam 8: Magnetic Induction84 Questions
Exam 9: Alternating-Current Circuits119 Questions
Exam 10: Maxwells Equations and Electromagnetic Waves61 Questions
Exam 11: Properties of Light116 Questions
Exam 12: Optical Images143 Questions
Exam 13: Interference and Diffraction116 Questions
Exam 14: Wave Particle Duality and Quantum Physics153 Questions
Exam 15: Applications of the Schrodinger Equation54 Questions
Exam 16: Atoms128 Questions
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Exam 21: Elementary Particles and the Beginning of the Universe68 Questions
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Use the following figure to answer the next five problems:
-You connect three capacitors as shown in the diagram. C1 = C3 = 2.5 F, and
C2 = 5.0 F. A potential difference of 9.0 V is maintained between the terminals A and B. The magnitude of the charge on capacitor C3 is approximately
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You want to use three capacitors in a circuit. If each capacitor has a capacitance of 3 pF, the configuration that gives you an equivalent capacitance of 2 pF between points x and y is
(Multiple Choice)
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Which of the following statements about parallel plate capacitor is false?
(Multiple Choice)
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The equivalent capacitance of three capacitors in parallel is
(Multiple Choice)
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If you decrease the charge on a parallel-plate capacitor from 12 µC to 4 µC and increase the plate separation from 1 mm to 3 mm, the energy stored in the capacitor changes by a factor of
(Multiple Choice)
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If you increase the charge on a parallel-plate capacitor from 3 µC to 9 µC and increase the plate separation from 1 mm to 3 mm, the energy stored in the capacitor changes by a factor of
(Multiple Choice)
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If the area of the plates of a parallel-plate capacitor is doubled, the capacitance is
(Multiple Choice)
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If the area of the plates of a parallel plate capacitor is halved and the separation between the plates tripled, then by what factor does the capacitance change?
(Multiple Choice)
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If a dielectric is inserted between the plates of a parallel-plate capacitor that is connected to a 100-V battery, the
(Multiple Choice)
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A charged capacitor has an initial electric field
0 and potential difference V0 across its plates. Without connecting any source of emf, you insert a dielectric ( > 1) slab between the plates to produce an electric field
d and a potential difference Vd across the capacitor. The pair of statements that best represents the relationships between the electric fields and potential differences is
(Multiple Choice)
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A 1.0- F capacitor and a 2.0- F capacitor are connected in series across a 1200-V source. The charge on each capacitor is
(Multiple Choice)
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If C1 < C2 < C3 < C4 for the combination of capacitors shown, the equivalent capacitance
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A 2.0-µF capacitor has a potential difference of 5000 V. The work done in charging it was
(Multiple Choice)
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If 20 capacitors, each of 100 F, were connected in parallel across a 12-V battery, what would be the total energy stored in the capacitors?
(Multiple Choice)
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The voltage across each capacitor in a set of capacitors in series is
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If the potential difference of a capacitor is reduced by one-half, the energy stored in that capacitor is
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A coaxial cable has the inner wire of radius a = 1 mm and the outside shield of radius
B = 8 mm. The electric field strength between the wire and the shield is given by
. The electrostatic energy per meter of the cable is
(Multiple Choice)
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A parallel plate capacitor has a plate spacing of 1.5 mm, which is filled with a dielectric of = 4.3, and its capacitance is 80 F. If the dielectric is taken out and the plate spacing doubled, then what is the new capacitance?
(Multiple Choice)
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