A brass cube, 15.0 cm on a side, is raised in temperature by 170C. The coefficient of volume expansion of brass is 57 106/C. By what percentage does volume increase?
a. 33
b. 1.4
c. 1.0
d. 3.4
e. 2.81
[Ques. 2] Three capacitors of 0.60, 1.2, and 2.9 F are connected in series. Find the combined capacitance.
a. 2.8 F
b. 4.7 F
c. 6.8 F
d. 0.35 F
e. 2.1 F
[Ques. 3] Which best expresses the value for the coefficient of volume expansion, , for given material as a function of its corresponding coefficient of linear expansion, ?
a. = 3
b. = 3
c. = 2
d. = 2
[Ques. 4] Four identical 2.5-mF capacitors are connected together electrically. What is the greatest possible capacitance of the combination?
a. 0.50 mF
b. 0.42 mF
c. 0.63 mF
d. 10 mF
e. 0.40 mF
[Ques. 5] What happens to a given mass of water as it is cooled from 4C to zero?
a. expands
b. contracts
c. vaporizes
d. Neither expands, contracts, nor vaporizes.
[Ques. 6] Increasing the separation of the two charged parallel plates of a capacitor, which are disconnected from a battery, will produce what effect on the capacitor?
a. increase charge
b. decrease charge
c. increase capacitance
d. decrease capacitance
[Ques. 7] A rectangular steel plate with dimensions of 40.0 cm 30.0 cm is heated from 14.0C to 164.0C. What is its change in area? (Coefficient of linear expansion for steel is 11 106/C.)
a. 8.96 cm2
b. 29.7 cm2
c. 3.96 cm2
d. 1.32 cm2
e. 9.90 cm2
[Ques. 8] A 20-F capacitor is attached across a 1 000-V power supply. What is the net charge on the capacitor?
a. 10 mC
b. 20 mC
c. 40 mC
d. none of the above
[Ques. 9] A steel wire, 86.0 m long at 21C, has a coefficient of linear expansion of 11 106/C. Give its change in length as the temperature changes from 21C to 36C.
a. 2.0 cm
b. 3.4 cm
c. 1.4 cm
d. 0.21 cm
e. 6.3 cm
[Ques. 10] If two parallel, conducting plates have equal positive charge, the electric field lines will:
a. leave one plate and go straight to the other plate.
b. leave both plates and go to infinity.
c. enter both plates from infinity.
d. none of the above.
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