Chapter 24: Q10CQ (page 886)
Can an antenna be any length? Explain your answer
The size of the antenna shouldn't be of any length.
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What capacitance is needed in series with an inductor to form a circuit that radiates a wavelength of ?
A radio station utilizes frequencies between commercial AM and FM. What is the frequency of a 11.12-m-wavelength channel?
Consider the most recent generation of residential satellite dishes that are a little less than half a meter in diameter. Construct a problem in which you calculate the power received by the dish and the maximum electric field strength of the microwave signals for a single channel received by the dish. Among the things to be considered are the power broadcast by the satellite and the area over which the power is spread, as well as the area of the receiving dish.
(a) Calculate the ratio of the highest to lowest frequencies of electromagnetic waves the eye can see, given the wavelength range of visible light is from 380 to 760 nm . (b) Compare this with the ratio of highest to lowest frequencies the ear can hear.
(a) What is the wavelength of 100 MHz radio waves used in an MRI unit? (b) If the frequencies are swept over a range centered on 100MHz , what is the range of wavelengths broadcast?
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