An offshore wind turbine has a tuned receiving circuit with a natural frequency of 1.20 × 108 Hz.
The circuit receives two radio signals.
| signal | information about the signal |
|---|---|
| P | wavelength = 2.50 m |
| Q | the transmitting circuit completes 2.60 × 106 oscillations in 0.0200 s |
Both signals travel at 3.00×108 m s−13.00\times10^8\ \mathrm{m\,s^{-1}}3.00×108 ms−1. Each signal is received for 0.0175 s.
Calculate the frequency of each signal.
Explain which signal produces the strongest response in the tuned receiving circuit.
Calculate the number of complete electrical oscillations induced by this signal during 0.0175 s.
Use v=fλv=f\lambdav=fλ.
104 exam-style questions on Edexcel GCSE Physics 5.4 Uses and dangers of EM radiation, covering 5.4.1 Dangers of electromagnetic radiation, 5.4.2 Uses of electromagnetic radiation, 5.4.3 Radio waves and oscillations in circuits, and 5.4.4 Changes in atoms and nuclei generating radiation. Each one has a worked solution and a mark scheme showing where the marks go.