Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Explain how a microphone works |
-Sound-waves hit the diaphragm (sheet o plastic in a microphone), causing it to vibrate -Due to this, the coil of wire moves in and out through the magnesite field, causing a potential difference across the ends of the wire -As the coil of the wire moves back and forth the pot dif switches direction -Frequency if the changing potential difference=frequency of sound waves -Changing pattern of potential difference is now passed through an amplifier & then into a moving-coil l speaker, which increases the sound volume |
1. sw h die ➡️ v 2. coil o wire mov i&o thr mag fie➡️pot dif acr e of w 3. coil m b&f pd swi dir 4. fr pd=sw 5. ch pat o pd pas thr amp |
|
|
What does this symbol mean? ❌⭕️ |
Into the page |
|
|
|
What does this symbol mean 🔴⭕️ |
Out of the page |
|
