Recent content by Kruum

  1. K

    Engineering Equivalent circuit with resistors neither in series nor parallel

    A much simpler way, for me at least, is to use the delta-Y conversion. That way you can use the normal series and parallel connections, without having to resort to KCL and KVL.
  2. K

    Understanding AC Waveforms: How Does Phase Shift Affect Voltage?

    I get the same V=-11.66V as well. Is this an online assignment, or how do you know it's not the right answer? If the problem was in degrees, I would assume the angular frequency would have the degree symbol added. After all, rad/s is the more commonly used unit.
  3. K

    Understanding AC Waveforms: How Does Phase Shift Affect Voltage?

    I'm not quite following you here. What does the last part, p-p = 120, mean? When I graphically checked the answer, I got the same as plugging in the values to the given signal.
  4. K

    Calculating Probability of Particle in a Box

    Thanks for the replies, guys! I forgot the one n in my first post. I found out my error was in the easy stuff after the integration, I'd done a mistake in adding fractions. :redface:
  5. K

    Understanding AC Waveforms: How Does Phase Shift Affect Voltage?

    Welcome to PF, newbie991! The 60º only sifts the angle, well 60 degrees. You've probably done trigonometry, where sin(∏+∏)=sin(2∏). You just got to be careful, though. Here the voltage is in the form v=60sin(ωt+60º).
  6. K

    Why is the system considered linear in this case?

    Check out the last two lines again. You've got a mistake there...
  7. K

    Calculating Probability of Particle in a Box

    Homework Statement A particle is in a box of width L. Calculate the probability to find the particle in the region [L/4, 3L/4] when the particle is a) in the ground state b) in the first excited state. Homework Equations (2/L)sin(n*π*x/L)^2 dx is the probability in [x, x+dx] The...
  8. K

    Understanding the Limitations of Faster-than-Light Travel in Physics

    I'm sorry if I'm doing something wrong here, but my question is close to this topic and I don't want to start a new one. Anyways, I'm reading a book that says the following: Source: Michio Kaku, Physics of the Impossible, 1st edition, Anchor Books (2008). I know the book has very...
  9. K

    Where Can I Find Sinusoidal Problems for RC and RL Circuits?

    Welcome to PF, m.farrukh! You might want to check out the http://www.allaboutcircuits.com/worksheets/index.html" at allaboutcircuits.com.
  10. K

    Engineering Simple RC Circuit Voltage Division Solution

    Can you post the whole problem? I'm quite sure you have left something important out. One error I can see right now is, you haven't laplace transformed the pulse signal.
  11. K

    Engineering Superposition Circuits problem, need guidance and help

    I'm getting a bit confused. If you know how to determine the directions of the currents, are you still saying the current is .8A+.14A=.94A?
  12. K

    Tips on solving resistor ladders

    Welcome to PF, stimpyholder! You could describe solving this one backwards. You just need work your way through the circuit resistor pair at a time. Star with the connection of the two 20k\Omega resistors.
  13. K

    Engineering Superposition Circuits problem, need guidance and help

    Here's a tip for you how to determine the direction of the current. Voltage sources produce current going from their + -terminal to - -terminal and current sources to the direction in which their arrow point. I'm also curious, how you got .114A as the other current. .8A-.114A=.686A Maybe a typo?
  14. K

    Current Through R1 After Closing Switches in RC Circuit

    If there's a short circuit in the circuit, all the current will go through it. No current through R2 or R3, no voltage drop.
  15. K

    RC circuit and discharging a capacitor

    If you are familiar with Laplace transformation, this problem can simply be solved by making a laplace transformation of the circuit and calculating the necessary value.
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