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Constants
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1) A FM station broadcasts at
MHz, what is its wavelength to the nearest hundredth of a meter?
2) What is the frequency, to the nearest tenth of a MHz, of a microwave with a wavelength of
cm?
3) How long to the nearest tenth of a millisecond does it take your voice to travel over a telephone line to a friend
miles away?
4) How far away, to the nearest tenth of a light-year, is a star if it takes light
x10
8
seconds to reach us?
5) The switch in a RC circuit is closed, if the resistance is 200000 ohms, the capacitance
microF and the applied voltage 10 volts what is the rate of change of the voltage on the capacitor to the nearest tenth of a V/s, during the first time constant period?
6) If the capacitor in the previous problem has a plate separation of 1 mm what is the average displacement current,to the nearest tenth of a microamp, during that time period?
7) To the nearest V/m, what is the maximum value of the electric vector in light of intensity
W/m
2
?
8) In the previous question what is the maximum value of the magnetic field to the nearest tenth of a microT?