Marcin H said:
It's a series circuit right? In series current is the same throughout the circuit and voltage is different. For parallel voltage is the same and current is different.Jake 7174 said:
Right. What is the voltage across resistor then?Marcin H said:
Im not sure. Would it be 3V? Va-Vb?cnh1995 said:
Marcin H said:
.01A. So does that mean that .01A are flowing through the LED?Jake 7174 said:
Yes.Marcin H said:
Marcin H said:
Yes. same current, different voltage.Jake 7174 said:
Marcin H said:
Thanks!Jake 7174 said:
An LED, or light-emitting diode, is a semiconductor device that emits light when an electric current flows through it. It is a type of solid-state lighting that is commonly used in electronic devices, lighting fixtures, and displays.
Current flows through an LED when a voltage is applied across its terminals. The voltage causes electrons to flow from the negative terminal to the positive terminal, passing through the LED's semiconductor material. This flow of electrons creates photons, which are the particles of light emitted by the LED.
The brightness of an LED is directly proportional to the current flowing through it. This means that as the current increases, the brightness of the LED will also increase. However, there is a limit to how much current an LED can handle before it becomes damaged, so it is important to use the appropriate amount of current for the specific LED being used.
Limiting the current flowing through an LED is important for two reasons. First, as mentioned before, too much current can damage the LED. Second, LEDs have a lower forward voltage drop than other types of lighting, such as incandescent bulbs, meaning they require less voltage to operate. Therefore, using a resistor to limit the current helps prevent the LED from being overloaded with too much voltage.
The color of an LED is determined by the material used in the semiconductor. Different materials produce different colors of light when an electric current flows through them. While the color of the LED does not directly affect the current flowing through it, different colored LEDs may have slightly different voltage and current requirements, so it is important to check the specifications of the LED before use.