Microphones and speakers; oscillating currents in detection and generation of radiation — WJEC GCSE Physics
In summary: Microphones and speakers; oscillating currents in detection and generation of radiation is a key topic in WJEC GCSE Physics. Key exam tip: Ensure you can clearly distinguish between the function of a microphone and a loudspeaker
Exam Tips for Microphones and speakers; oscillating currents in detection and generation of radiation
- Ensure you can clearly distinguish between the function of a microphone and a loudspeaker
- Be prepared to explain the energy transfers involved in these devices
Marking Points
- Explanation of how microphones convert pressure variations in sound waves into variations in electrical current
- Explanation of the reverse effect in loudspeakers and headphones
- Understanding of the role of oscillating currents in the generation and detection of radiation
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