PHYS208 Fundamentals of Physics II

Answer for Ch. 31, 29P

a) Please note the missing ln in the answer section of HRW.

[formula]

b)
[formula]

Answer for Ch. 31, 35P

vt = mgR / B2L2

extension: 16.5 mm/s.

Answer for Ch. 31, 39P

a) Taking the time derivative of the expression below leads to an induced emf of 0.24 mV for the parameters stated in problem description.

[formula

b) The induced current is 0.60 mA clockwise.

c) Thermal power generated is 0.144 microW.

d) The external agent must apply a force of 28.7 nanoN.

e) Same power as part c).


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Last updated April 16, 1998.
Copyright George Watson, Univ. of Delaware, 1997.