A tunnel has a cross section of 4 by 7 m. Will a car receive an FM ( 100 MHz) ra

Question

A tunnel has a cross section of 4 by 7 m. Will a car receive an FM ( 100 MHz) radio signal? What about an AM Explain. e. 1 MHz) one? Show that when the electric field is at its maximum value, the magnetic energy in a cavity is zero. f. What is the number of degenerate dominant modes in a rectangular resonant cavity for which a g. b = c ? Explain. h. Sketch the excitation of the mode TEzx from a coaxial line. Explain. How is the surface current density K of the mode TE1o estimated? Sketch the currents. i.

Explanation / Answer

(a) for FM 100 Mhz wave lenth is 3 m, And For AM 1 MHz wavelength is 300 m

So for tunnel 4 by 7 m only FM signal recive by a car because tunnel cross-section match with FM wavelength.

(b) For finding maxima of any fuction we first take derivative of that fuction and equate with 0.

the time derivative of electric field is magnetic field hence for max electric field magnetic field is 0

pls post seperatly other question.

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