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- 1. Multiple ChoiceAs a proton moves in the direction the electric field lines...it is moving from low potential to high potential and gaining electric potential energy.it is moving from low potential to high potential and losing electric potential energy.it is moving from high potential to low potential and gaining electric potential energy.it is moving from high potential to low potential and losing electric potential energy.
- 2. Multiple ChoiceA proton is accelerated from rest through a potential difference V0 and gains a speed v0. If it were accelerated instead through a potential difference of 2V0, what speed would it gain?8v04v0v0√22v0
- 3. Multiple ChoiceThe electric potential at a distance of 4 m from a certain point charge is 200 V relative to infinity. What is the potential (relative to infinity) at a distance of 2 m from the same charge?600 V50 V200 V400 V
- 4. Multiple ChoiceTwo protons are released from rest, with only the electrostatic force acting. Which of the following statements is NOT true about them as they move apart?Their electric potential energy keeps decreasing.Their electric potential energy keeps increasing.Their acceleration keeps decreasing.Their kinetic energy keeps increasing.
- 5. Multiple Choice
A region of space contains a uniform electric field, directed toward the right, as shown in the figure. Which statement about this situation is correct?The potential at point A is the highest, the potential at point B is the second highest, and the potential at point C is the lowest.The potential at points A and B are equal, and the potential at point C is lower than the potential at point A.The potential at all three locations is the same.The potentials at points A and B are equal, and the potential at point C is higher than the potential at point A. - 6. Multiple ChoiceWhich statements must be true about the surface of a charged conductor in which no charge is moving?The electric field is zero at the surface.The electric potential of the surface is zero.The electric potential is constant over the surface.The electric field is constant at the surface.
- 7. Multiple ChoiceHow much kinetic energy does a proton gain if it is accelerated, with no friction, through a potential difference of 1.00 V? The proton is 1836 times heavier than an electron, and e = 1.60 × 10-19 C.1836 eV1836 J1.00 eV1.60 × 10-19 eV
- 8. Multiple ChoiceHow much work must we do on an electron to move it from point A, which is at a potential of +50V, to point B, which is at a potential of -50 V, along the semicircular path shown in the figure? Assume the system is isolated from outside forces. (e = 1.60 × 10-19 C)1.60 × 10-17 J-1.6 J1.6 J-1.60 × 10-17 J
- 9. Multiple ChoiceA proton that is initially at rest is accelerated through an electric potential difference of magnitude 500 V. What speed does the proton gain? (e = 1.60 × 10-19 C , mproton = 1.67 × 10-27 kg)1.1 × 105 m/s2.2 × 105 m/s9.6 × 105 m/s3.1 × 105 m/s
- 10. Multiple ChoiceA 4.0-g bead carries a charge of 20 μC. The bead is accelerated from rest through a potential difference V, and afterward the bead is moving at 2.0 m/s. What is the magnitude of the potential difference V?400 V200 V400 kV800 kV
- 11. Multiple ChoiceA sphere with radius 2.0 mm carries a charge. What is the potential difference, between point B, which is from the center of the sphere, and point A, which is from the center of the sphere? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2)1500 V-0.63 V-1500 V170 V
- 12. Multiple ChoiceA +4.0-μC and a -4.0-μC point charge are placed as shown in the figure. What is the potential difference between points A and B? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2)0 V48 kV96 kV48 V
- 13. Multiple ChoiceAn electron is released from rest at a distance of 9.00 cm from a fixed proton. How fast will the electron be moving when it is 3.00 cm from the proton? (k = 1/4πε0 = 8.99 × 109 N ∙ m2/C2, e = 1.60 × 10-19 C, melectron = 9.11 × 10-31 kg, mproton = 1.67 × 10-27 kg)130 m/s4.64 × 105 m/s1.06 × 103 m/s106 m/s
- 14. Multiple ChoiceIn a region where the electric field is uniform and points in the +x direction, the electric potential is -2000 V at x = 8 m and is +400 V at x = 2 m. What is the magnitude of the electric field?500 V/m600 V/m200 V/m400 V/m
- 15. Multiple ChoiceFour charged particles (two having a charge +Q and two having a charge -Q) are arranged in the xy-plane, as shown in the figure. These particles are all equidistant from the origin. The electric potential (relative to infinity) at point P on the z-axis due to these particles, isPositiveNegativezeroimpossible to determine based on the information
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