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© 2012 Pearson Education, Inc.. Batteries: constant potential electrochemical devices Do not touch wire to both ends of car battery, will create heat.

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Presentation on theme: "© 2012 Pearson Education, Inc.. Batteries: constant potential electrochemical devices Do not touch wire to both ends of car battery, will create heat."— Presentation transcript:

1 © 2012 Pearson Education, Inc.

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3 Batteries: constant potential electrochemical devices Do not touch wire to both ends of car battery, will create heat and hydrogen gas, boom!

4 © 2012 Pearson Education, Inc. Two conducting spheres, one charged other neutral

5 © 2012 Pearson Education, Inc. A particle follows the trajectory shown from initial position i to final position f. The potential difference  V is A. B. C. D. E. 100 V. 50 V. 0 V.  50 V.  100 V.

6 © 2012 Pearson Education, Inc. A proton is released from rest at the dot. Afterward, the proton A.Remains at the dot. B.Moves upward with steady speed. C.Moves upward with an increasing speed. D.Moves downward with a steady speed. E.Moves downward with an increasing speed.

7 © 2012 Pearson Education, Inc. The electric field at the dot is A. B. C. D. E. 10î V/m.  10î V/m. 20î V/m. 30î V/m.  30î V/m.

8 © 2012 Pearson Education, Inc. Metal wires are attached to the terminals of a 3 V battery. What is the potential difference between points 1 and 2? A. 6 V. B. 3 V. C. 0 V. D. Undefined. E. Not enough information to tell.

9 © 2012 Pearson Education, Inc. 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

10 © 2012 Pearson Education, Inc. Which set of equipotential surfaces matches this electric field?

11 © 2012 Pearson Education, Inc. Metal spheres 1 and 2 are connected by a metal wire. What quantities do spheres 1 and 2 have in common? A. Same potential. B. Same electric field. C. Same charge. D. Both A and B. E. Both A and C.

12 © 2012 Pearson Education, Inc. 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 (a) The balloons will become equal in size. (b) The large balloon will become a bit smaller, the small balloon a bit bigger. (c) The large balloon will become bigger, the small balloon smaller. (d) Nothing happens.

13 © 2012 Pearson Education, Inc. Capacitors

14 © 2012 Pearson Education, Inc. What is the capacitance of these two electrodes? A. 8 nF. B. 4 nF. C. 2 nF. D. 1 nF. E. Some other value.

15 © 2012 Pearson Education, Inc. If the plates are moved further apart, the electric field magnitude at point 5 will A. Increase. B. Stay the same. C. Decrease. D. Don't know how to proceed.

16 © 2012 Pearson Education, Inc. The equivalent capacitance is A. 9  F. B. 6  F. C. 3  F. D. 2  F. E. 1  F.

17 © 2012 Pearson Education, Inc. The equivalent capacitance is A. 9  F. B. 6  F. C. 3  F. D. 2  F. E. 1  F.

18 © 2012 Pearson Education, Inc. 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? A V. B V. C. 0 V. D. E.  1000 V.  2000 V.

19 © 2012 Pearson Education, Inc. At which point is the electric field stronger? A.At x A. B.At x B. C.The field is the same strength at both. D.There’s not enough information to tell.

20 © 2012 Pearson Education, Inc. An electron is released from rest at x  2 m in the potential shown. What does the electron do right after being released? A. Stay at x  2 m. B. Move to the right (  x) at steady speed. C. Move to the right with increasing speed. D. Move to the left (  x) at steady speed. E. Move to the left with increasing speed.

21 © 2012 Pearson Education, Inc.


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