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(a)
The rate of energy absorbed by the water.
(a)
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Answer to Problem 81P
The rate of energy absorbed by the water is
Explanation of Solution
Write the expression for rate of energy absorption.
Here,
Conclusion:
Substitute
Convert the rate of energy absorption into kilowatt.
Therefore, the rate of energy absorbed by the water is
(b)
The average intensity of the microwaves.
(b)
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Answer to Problem 81P
The average intensity of the microwaves is
Explanation of Solution
Write the expression for average intensity of the microwaves.
Here,
Write the expression for power.
Substitute equation (III) in the equation (II).
Substitute equation (I) in the equation (IV).
Conclusion:
Substitute ,
,
,
Therefore, the average intensity of the microwaves is
(c)
The rms electric and magnetic fields.
(c)
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Answer to Problem 81P
The rms electric field inside the waveguide is
Explanation of Solution
Write the expression for rms electric field inside the waveguide.
Here,
Compare the equation (V) and (VI) to solve for
Write the rms magnetic field inside the waveguide.
Here,
Conclusion:
Substitute ,
,
,
in above equation to find
Convert rms electric field into kV/m.
Substitute
Therefore, the rms electric field inside the waveguide is
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Chapter 22 Solutions
Physics
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