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25-04-2024
Physics

Answered

A microwave uses standing electromagnetic waves to cook food. Assume the wavelength is 12.2 cm.
a. What is the frequency of the standing waves (Hz)?
b. Write down equations for the electric and magnetic standing waves (use variables for Emax, Bmax).
c. How long must the cavity be to contain 5 nodes?
d. Assume the maximum electric field strength is Emax 2.0 kV/m. Estimate the maximum magnetic field and maximum power density (W/m²).

Answer :

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