A community for students.
Here's the question you clicked on:
 0 viewing
trial123
 3 years ago
For circuit (a) below, determine if the LED lights up. For circuit (b) below, which LED is
brightest and which is dimmest? Show work.
Here's the picture:
http://postimage.org/image/rjctt2w6z/
trial123
 3 years ago
For circuit (a) below, determine if the LED lights up. For circuit (b) below, which LED is brightest and which is dimmest? Show work. Here's the picture: http://postimage.org/image/rjctt2w6z/

This Question is Closed

slotema
 3 years ago
Best ResponseYou've already chosen the best response.0For a), the big question is when a LED is on. DO you have an idea of when a diode (in general) will conduct? As for b), what makes a LED glow brighter? Is it voltage, or current or something else?

whpalmer4
 3 years ago
Best ResponseYou've already chosen the best response.1The voltage across the LED in a) is 5v * (200 ohms/(200 ohms+300 ohms+100ohms)) = 5/3 V. As I recall, that's too low for most LEDs, usually need 2 V or more.
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.