An electric charge oscillating with a frequency of 1 kilo cycles second can radiate electromagnetic waves of wavelength:
Correct answer: C. 300 km
- A. 100 km
- B. 200 km
- C. 300 km
- D. 400 km
Explanation
This is the following solution:Wavelength = c/v=3×10⁸ms-¹/1000s-¹=3×10⁵=300Km
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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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