Physics Quiz 5

Card Set Information

Author:
iishvo
ID:
228108
Filename:
Physics Quiz 5
Updated:
2013-07-25 00:08:52
Tags:
Quiz
Folders:

Description:
PHysics
Show Answers:

Home > Flashcards > Print Preview

The flashcards below were created by user iishvo on FreezingBlue Flashcards. What would you like to do?


  1. A device that produces electricity by transforming chemical energy into electrical energy is called a
    battery
  2. A car battery
    has an emf of 12 V consisting of six 2-V cells connected in series.
  3. The total amount of charge that passes through a wire's full cross section at any point per unit of time is referred to as
    current
  4. The direction of convention current is taken to be the direction that
    positive charges would flow.
  5. A coulomb per second is the same as
    an ampere.
  6. Car batteries are rated in "amp-hours." This is a measure of their
    charge
  7. The resistance of a wire is defined as
    voltage/current
  8. What is 1 Ohm equivalent to?
    1 V/A
  9. The resistance of a wire is
    proportional to its length and inversely proportional to its cross-sectional area
  10. The resistivity of a wire depends on
    the material out of which it is composed.
  11. Which conducting material has the lowest resistivity value?
    silver
  12. Consider two copper wires. One has twice the length of the other. How do the resistivities of these two wires compare?
    Both wires have the same resistivity.
  13. Consider two copper wires. One has twice the length of the other. How do the resistances of these two wires compare?
    The longer wire has twice the resistance of the shorter wire.
  14. Consider two copper wires. One has twice the cross-sectional area of the other. How do the resistances of these two wires compare?
    The thicker wire has half the resistance of the shorter wire.
  15. Consider two copper wires. One has twice the length and twice the cross-sectional area of the other. How do the resistances of these two wires compare?
    Both wires have the same resistance.
  16. The length of a wire is doubled and the radius is doubled. By what factor does the resistance change?
    half as large
  17. How much more resistance does a 1.0 cm diameter rod have compared to a 2.0 cm diameter rod of the same length and made of the same material?
    300%
  18. The resistivity of most common metals
    increases as the temperature increases.
  19. Negative temperature coefficients of resistivity
    exist in semiconductors
  20. What is 1 W equivalent to?
    1 V*A
  21. A kilowatt-hour is equivalent to
    3,600,000 J
  22. If the resistance in a constant voltage circuit is doubled, the power dissipated by that circuit will
    decrease to one-half its original value.
  23. If the voltage across a circuit of constant resistance is doubled, the power dissipated by that circuit will
    quadruple
  24. If the resistance in a circuit with constant current flowing is doubled, the power dissipated by that circuit will
    double
  25. If the current flowing through a circuit of a constant resistance is doubled, the power dissipated by that circuit will
    quadruple

What would you like to do?

Home > Flashcards > Print Preview