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Two rocks have equal mass. Which has more gravitational potential energy?

Two rocks have equal mass. Which has more gravitational potential energy?. Rock A. Rock B. They have the same potential energy. Both have zero potential energy. Slide 28-25. Two positive charges are equal. Which has more electric potential energy?. Charge A. Charge B.

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Two rocks have equal mass. Which has more gravitational potential energy?

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  1. Two rocks have equal mass. Which has more gravitational potential energy? Rock A. Rock B. They have the same potential energy. Both have zero potential energy. Slide 28-25

  2. Two positive charges are equal. Which has more electric potential energy? Charge A. Charge B. They have the same potential energy. Both have zero potential energy. Slide 28-28

  3. Two negative charges are equal. Which has more electric potential energy? Charge A. Charge B. They have the same potential energy. Both have zero potential energy.

  4. A and B are an electron and proton respectively. Which has more electric potential energy? The electron A. The proton B. They have the same potential energy. Both have zero potential energy.

  5. A and B are two neutral hydrogen atoms. Which has more electric potential energy? Atom A. Atom B. They have the same potential energy. Both have zero potential energy.

  6. A positive and a negative charge are released from rest in vacuum. They move toward each other. As they do: A positive potential energy becomes more positive. A positive potential energy becomes less positive. A negative potential energy becomes more negative. A negative potential energy becomes less negative. A positive potential energy becomes a negative potential energy.

  7. A positively charged object and a negatively charged object are pulled away from one another. Then: the electric potential energy increases. the electric potential energy stays the same. the electric potential energy decreases.

  8. The electric potential energy of two point charges approaches zero as the two point charges move farther away from each other. If the three point charges shown here lie at the vertices of an equilateral triangle, the electric potential energy of the system of three charges is Charge #2 +q Charge #1 +q y –q x Charge #3 positive. B. negative. C. zero. D. not enough information given to decide

  9. The electric potential due to a point charge approaches zero as you move farther away from the charge. If the three point charges shown here lie at the vertices of an equilateral triangle, the electric potential at the center of the triangle is Charge #2 +q Charge #1 +q y –q x Charge #3 positive. B. negative. C. zero. D. not enough information given to decide

  10. At the midpoint between these two equal but opposite charges, E 0;V = 0. E 0;V > 0. E 0;V < 0. E points right; V = 0. E points left; V = 0.

  11. At which point or points is the electric potential zero? A. B. C. D. E. More than one of these.

  12. A positive charge moves as shown. Its kinetic energy Increases. Remains constant. Decreases. Slide 28-35

  13. An electron follows the trajectory shown from point 1 to point 2. At point 2, v2 > v1. v2 = v1. v2 < v1. Not enough information to compare the speeds at these points.

  14. Two protons, one after the other, are launched from point 1 with the same speed. They follow the two trajectories shown. The protons’ speeds at points 2 and 3 are related by v2 > v3. v2 = v3. v2 < v3. Not enough information to compare their speeds.

  15. Two conducting spheres, one charged other neutral

  16. If a positive charge is released from rest, it moves in the direction of A stronger electric field. A weaker electric field. Higher electric potential. Lower electric potential. Both B and D.

  17. A proton is released from rest at the dot. Afterward, the proton Remains at the dot. Moves upward with steady speed. Moves upward with an increasing speed. Moves downward with a steady speed. Moves downward with an increasing speed.

  18. Slide 28-35

  19. The electric potential energy of two point charges approaches zero as the two point charges move farther away from each other. If the three point charges shown here lie at the vertices of an equilateral triangle, the electric potential energy of the system of three charges is Charge #2 –q Charge #1 +q y –q x Charge #3 positive. B. negative. C. zero. D. not enough information given to decide

  20. Consider a point P in space where the electric potential is zero. Which statement is correct? A. A point charge placed at P would feel no electric force. B. The electric field at points around P is directed toward P. C. The electric field at points around P is directed away from P. D. none of the above E. not enough information given to decide

  21. Metal spheres 1 and 2 are connected by a metal wire. What quantities do spheres 1 and 2 have in common? Same potential. Same electric field. Same charge. Both A and B. Both A and C.

  22. Two identical balloons are connected after blowing one up to about ½ its maximum volume, the other to about ¼ its maximum volume. When the valve is turned so air can equalize between the two balloons The balloons will become equal in size. The large balloon will become a bit smaller, the small balloon a bit bigger. The large balloon will become bigger, the small balloon smaller. Nothing will happen.

  23. At the midpoint between these two equal but opposite charges, E 0;V = 0. E 0;V > 0. E 0;V < 0. E points right; V = 0. E points left; V = 0.

  24. Where is the electric potential zero? A. B. C. D. E. More than one of these. http://phet.colorado.edu/sims/charges-and-fields/charges-and-fields_en.html

  25. Estimate E along shortest path between two equipotential contours.

  26. 100 V. 50 V. 0 V. 50 V. 100 V. A particle follows the trajectory shown from initial position i to final position f. The potential difference V is

  27. A proton is released from rest at the dot. Afterward, the proton Remains at the dot. Moves upward with steady speed. Moves upward with an increasing speed. Moves downward with a steady speed. Moves downward with an increasing speed.

  28. Which set of equipotential surfaces matches this electric field?

  29. 2000 V. 1000 V. 0 V. 1000 V. 2000 V. This is a graph of the x-component of the electric field along the x-axis. The potential is zero at the origin. What is the potential at x1m?

  30. At which point is the electric field stronger? At xA. At xB. The field is the same strength at both. There’s not enough information to tell.

  31. An electron is released from rest at x 2 m in the potential shown. What does the electron do right after being released? Stay at x 2 m. Move to the right (x) at steady speed. Move to the right with increasing speed. Move to the left (x) at steady speed. Move to the left with increasing speed.

  32. 10î V/m. 10î V/m. 20î V/m. 30î V/m. 30î V/m. The electric field at the dot is

  33. Metal wires are attached to the terminals of a 3 V battery. What is the potential difference between points 1 and 2? 6 V. 3 V. 0 V. Undefined. Not enough information to tell.

  34. What is the electric field magnitude E at point 5? (a) 0 N/C (b) 1500 N/C (c) 3000 N/C (d) 6000 N/C (e) Not enough information

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