Consider an electric charge oscillating with a frequency of 10 MHz. The radiation emitted will have a wavelength equal to:
Correct answer: B. 30 m
- A. 20 m
- B. 30 m
- C. 40 m
- D. 10 m
Explanation
This is the following solution:Frequency =10 MHzSo wavelength =3×10⁸/10×10⁶=30m
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About Alternating Current
Alternating current varies periodically, so phase relationships become essential when current passes through a resistor, capacitor or inductor. The chapter distinguishes resistance from capacitive and inductive reactance, explains phase lead and lag, and connects changing electric and magnetic fields with the production and properties of electromagnetic waves.
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