Question

13. If a charge of 3.0 coulombs is transferred through a potential is: difference of 6.0 volts, the amount of work done zero. b. 0.50 c. 2.0 d. 18 J none of these One volt is equal to: a. one (N/C)(m) b. one (kg my (s C) c. one ev (1.6x 10- C) d. all of these e. e. -14. none of these 15. A charge is moved through the potential difference from A to B. In which case is the most work done? A is at 240 Volts and B is at 120 Volts a. b. A is at 120 Volts and B is at 0 c. d. A is at 0 and B is at -120 Volts Both a and b. e. These are all the same. In the picture tube of a television set, electrons are accelerated through a potential difference of 25,000 v This means that the work done associated with the transfer of each electron through this potential difference is: a. 4.0 x 10-1s eV b. 4.0x 103 eV c. 25 keV d. 25 MeV e. 16. none of these 17. In a laboratory situation, a 2000 V potential difference is established between two plates that are 0.010 m apart. Between these plates, the value of E is: a. 20 V/m toward the - plate. b. 20 V/m toward the +plate. c. 2.0x 10 V/m toward the - plate. d. 2.0 x 10 V/m toward the +plate e. none of these 18. Consider the +1.6 x 1019 C charge of a proton. How much work would be involved in moving an electron from very far away to a position 5.3 x 10lh m away from the proton? a. 4.3 x 10-18 J b. 8.2 x 10-1 J c. 2.7 x 101 J d. 5.1x10リ e. none of these As one moves away from a positive "point" charge, the electric potential: a. increases in proportion to r, the distance. b. decreases in proportion to I/r, where r is the distance. c. decreases in proportion to I/r', where r is the distance. d. is independent of the distance since the field is constant. e. none of these. 19.

Answer 1