College Physics Reasoning and Relationships

Physics & Astronomy

Quiz 18 :

Electric Potential

Quiz 18 :

Electric Potential

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A free electron is in an electric field. With respect to the field, it experiences a force acting:
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D

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The unit of electrical potential, the volt, is dimensionally equivalent to:
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Two protons, each of charge 1.60 1019 C, are 3.00 105 m apart. What is the change in potential energy if they are brought 1.00 105 m closer together? (ke = 8.99 109 N·m2/C2)
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Which of the following characteristics are held in common by both gravitational and electrostatic forces when dealing with either point masses or charges?
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A proton (+1.6 1019 C) moves 10 cm along the direction of an electric field of strength 4.0 N/C. The electrical potential difference between the proton's initial and ending points is:
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A uniform electric field, with a magnitude of 600 N/C, is directed parallel to the positive x axis. If the potential at x = 4.0 m is 1000 V, what is the potential at x = 2.0 m?
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Two point charges of values +3.4 C and +6.6 C, respectively, are separated by 0.20 m. What is the potential energy of this 2-charge system? (ke = 8.99 109 Nm2/C2)
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An electron and a proton are each released from rest in the same uniform electric field. The electron moves a distance delectron and the proton moves a distance dproton as each particle's kinetic energy increases by 1.6 eV. How do delectron and dproton compare?
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If an electron is accelerated from rest through a potential difference of 300 V, find its approximate speed at the end of this process. (e = 1.6 1019 C; me = 9.1 1031 kg)
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If the distance between two isolated parallel plates that are oppositely charged is doubled, the electric field between the plates is essentially unchanged. However, the:
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An electron is released from rest at the negative plate of a parallel-plate capacitor. If the distance across the plates is 5.0 mm and the potential difference across the plates is 20 V, with what velocity does the electron hit the positive plate? (me = 9.1 1031 kg, e = 1.6 1019 C)
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The quantity of electrical potential, the volt, is dimensionally equivalent to:
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A uniform electric field, with a magnitude of 600 N/C, is directed parallel to the positive x axis. If the potential at x = 4.0 m is 1000 V, what is the change in potential energy of a proton as it moves from x = 4.0 m to x = 1.0 m? (qp = 1.6 1019 C)
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Two particles each have the same mass but particle #1 has four times the charge of particle #2. Particle #1 is accelerated from rest through a potential difference of 10 V and attains speed v. Particle #2 is accelerated from rest also through a potential difference of 10 V. What speed does particle #2 attain?
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Case 1: An electron is released from rest in a uniform electric field. Case 2: A proton is released from rest in a uniform electric field of the same magnitude as in case 1. How does the electric potential energy of the charge-field system behave in these cases?
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An electron in a cathode ray tube is accelerated through a potential difference of 10 kV. What kinetic energy does the electron gain in the process? (e = 1.6 1019 C)
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In which case does an electric field do positive work on a charged particle?
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If the distance between two negative point charges is increased by a factor of two, the resultant potential energy is what factor times the initial potential energy?
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An electron (charge 1.6 1019 C) moves on a path perpendicular to the direction of a uniform electric field of strength 3.0 N/C. How much work is done on the electron as it moves 20 cm?
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A proton (+1.6 1019 C) moves 10 cm on a path in the direction opposite to a uniform electric field of strength 3.0 N/C. How much work is done on the proton by the electrical field?
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