 #1
 299
 0
Homework Statement
All LEDs in the following circuit are identical. Each LED has a switch on voltage of 2V and draws a current of 20mA for optimal light production.
Determine the resistance of Rl that gives optimum operation for all LEDs.
Homework Equations
Ohms Law V=IR
The Attempt at a Solution
becuase the LEDs are connected in parallel I calculated the voltage for Rl to be 92 =7V then divided that by 20mA which gave me 350ohms, which is incorrect.
Attachments

5.4 KB Views: 261