so i was cleaning up my room this weekend and stumbled across my old guitar amp. as i was looking at it i realized that the amp had a lot to do with physics! We had just learned about variable resistors in class this past week and i noticed that the amp has a variable resistor to control the volume. i learned from the equation that resistance depends on resistivity, cross sectional area, and length. As i turn the knob to increase the volume, the length of the conductive material shortens. This results in less resistance, therefore allowing electrons to flow through at a faster rate. as i turn the volume knob down, the length increases, resulting in higher resistance. The electrons to flow slower and the current is decreased which causes a decrease in the sound output.
No comments:
Post a Comment