課程名稱︰普通物理學乙
課程性質︰必修或選修可抵通識
課程教師︰張寶棣
開課系所︰物治系
考試時間︰2005.6.24 14：20 ～ 17：30
試題 :
1.Express Maxwell's four equations in your words.(15％)
2.What are the three laws of thermodynamics？(10％)
3.What is the meaning of entropy？ Discuss it from macroscopic and microscopic
point of view.(10％)
4.Illustrate the idea of "field"？(10％)
5.Hovering over the pit of hell, the devil observes that as a student falls
past (within terminal velocity), the frequency of his scream decreases from
842 to 820 Hz. (a) Find the speed of descent of the student. (b) The
student's scream reflects from the bottom of the pit. Find the frequency of
the echo as heard by the student. (c) Find the frequency of the echo as
heard by the devil.(15％)
6.(a) How much heat flows from 20.0 Kg of 90.0℃ water placed in contact with
20.0 Kg of 20.0℃ water, producing a final temperature of 55.0℃？ (b) How
much work could a Carnet engine do with this amount of heat input, assuming
it operates between two reservoirs at constant temperatures of 90.0℃ and
20.0℃？ (c) What increase in entropy is produced by mixing 20.0 Kg of
90.0℃ water with 20.0 Kg of 20.0℃ water？ (d) Calculate the amount of work
made unavailable by this mixing using a low temperature of 20.0℃, and
compare it wihe the work done by Carnet engine.(20％)
7.In a laboratory situation, a 2000 V potential difference is established
between two plates the are 0.010 m apart. Between these plates, what are the
value and direction of the electric field？(5％)
8.Doubling the charge stored on a capacitor, how much does the energy change？
(5％)
9.Two straight wires are 0.80 m apart and 5.0 A currents flow in opposite
directions in these wires. What is the value of the Force/length ratio for
these wires due to the interaction between their currents？
(μo = 4π X 10^(-7) T-m/A)(5％)
10.When a magnet is in front of a coil with 10 loops and a cross-section of
6.0 X 10^(-4) m^2, there is an averge magnetic field through the loops of
0.25 T. If the magnet is turned on its axis so the opposite end now points
at the coil, what is the magnitude of the emf if this reversal in field
takes 0.40s？(5％)
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