A gated LC oscillator, operating at 27 kHz,...

Question 1 of 27070u1fUJuBqRzvOmmw7abnM

A gated LC oscillator, operating at 27 kHz, is being used to develop range markers. If each cycle is converted to a range mark, the range between markers will be:

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Question 1 of 27070

A gated LC oscillator, operating at 27 kHz, is being used to develop range markers. If each cycle is converted to a range mark, the range between markers will be:

🔍 Key Concepts

• Relationship between frequency, period (time per cycle), and speed of propagation of a radar pulse • Radar range is based on two-way travel time (out and back), not just one-way distance • Conversion between meters and nautical miles (1 nautical mile ≈ 1852 meters)

💭 Think About

• How do you find the time for one cycle of a 27 kHz signal? What is the formula for period when you know the frequency? • In that one-cycle time, how far does an electromagnetic wave travel at the speed of light (~3 × 10^8 m/s)? • Since radar range is based on echo return, how does the out-and-back nature of the pulse affect the range represented by one cycle?

✅ Before You Answer

• Be sure you compute the period correctly: $T = 1 / f$ with f in Hz • Use the correct speed of electromagnetic waves in air (about 3 × 10^8 m/s) to get distance traveled in one period • Don’t forget to divide by 2 for the round trip distance and then convert meters to nautical miles (1 nmi ≈ 1852 m) before comparing to the answer choices