Question

The typical operating current for a light-emitting diode is approximately:

• A. $1$ to $5mA$
• B. $5$ to $20mA$
• C. $20$ to $500mA$
• D. $500$ to $2000mA$

Answer 1

The correct option is B $5$ to $20mA$

Most common LED's require a forward operating voltage of between approximately $1.2$ to $3.6V$with a forward current rating of about $10$ to $30mA$.

See the image a current of $20mA$ is generally used.