
(a)
The wavelength of radio wave in air.
(a)

Answer to Problem 61P
The wavelength of radio wave in air is
Explanation of Solution
Write the expression for wavelength.
Here,
Conclusion:
Substitute
Therefore, the wavelength of radio wave in air is
(b)
The capacitance in the tuning circuit.
(b)

Answer to Problem 61P
The capacitance in the tuning circuit is
Explanation of Solution
Write the expression for the frequency in an LC circuit.
Here,
Rearrange equation (I) to obtain an expression for
Conclusion:
Substitute,
Therefore, the capacitance in the tuning circuit is
(b)
The maximum induced emf in the antenna.
(b)

Answer to Problem 61P
The maximum induced emf in the antenna is
Explanation of Solution
Write the expression for induced emf in the coil.
Here,
Write the expression for the maximum magnetic flux.
Here,
Replace
The maximum value of
Write the expression for the relationship between electric field and magnetic field.
Rewrite equation (IV).
Conclusions:
Substitute,
Therefore, the maximum induced emf in the antenna is
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Chapter 22 Solutions
Physics
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