Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

Qaisersatti Group Title

H7P3 /.......

  • one year ago
  • one year ago

  • This Question is Closed
  1. Qaisersatti Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Let's look at the effect of the inductance of a wire lead on a component. A typical 1/4 Watt discrete resistor comes with 1.5 inch leads of AWG #20 wire, one for each terminal. We usually mount such a part using only a bit of that wire. Suppose we end up with a total of 2cm of wire in series with that resistor. AWG #20 wire has a diameter of 0.812mm. So 2cm of this wire has an inductance of about 15.44nH. (The estimate of inductance is computed from from a magic formula that is not part of this subject. You can learn about this in an electromagnetic theory subject.) We will ignore the resistance of the 2cm of wire... Suppose we have a voltage source that turns on (it goes from 0 to V) at t=0, and suppose it is connected to an RO load through a resistor RS and a wire with inductance L. Let's model the situation as follows: Assume that the initial voltage across the load is zero. What is the final voltage across the load? Write an algebraic expression for this final value in terms of the parameters given: Write an algebraic expression for the time constant of this circuit in terms of the parameters given: Now, let's get down to numbers. Let V=3.3V, RS=22.0Ω, RO=50.0Ω, and L=15.44nH. How much time, in nanoseconds, does it take for the output voltage to reach vO=1.65V? This is a pretty significant amount of time! For comparison, how long, in nanoseconds, does light take to go 2cm? Remember, the speed of light is 299792458m/s.

    • one year ago
  2. Qaisersatti Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    has been trying whole day....

    • one year ago
  3. Nurali Group Title
    Best Response
    You've already chosen the best response.
    Medals 6

    (V*RO)/(RO+RS), L/(RO + RS), 0.273, 0.0667

    • one year ago
  4. monishvster Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    @nurali How you got 3rd part??

    • one year ago
    • Attachments:

See more questions >>>

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.