Quantcast

A community for students. Sign up today!

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

makenzie123

  • 2 years ago

3) Using ohm’s law, explain how voltage changes in relation to current, assuming that resistance remains constant. 4) As the electric current in a lightbulb is slowly increased the filament glows more and more brightly. Why does this happen? 5) Why did some of the lightbulb’s you tried burn out? 6) Why is there zero current when a lightbulb burns out?

  • This Question is Closed
  1. ebaxter01
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Q3 for a given resistance, increasing voltage will result in a proportionally higher current. This is because resistance is proportional to the voltage over the current (as a formula I=V/R where R is resistance, V is voltage and I is current). Q4 as the current increases the filament gets hotter, so the energy of the photons emitted increases and their frequency increases ie the light goes from dull red to bright white. Q5 the filament can get too hot and melt, which means the electrons can't get across the gap. Q6 the electrons can't get across because there isn't anything to carry them in a light bulb - not even air.

  2. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Ask a Question
Find 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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.