Recent content by wiiman3893

  1. W

    DC Motor Generator: Understanding Voltage and Current | FAQs

    I see... Now, how about using an alternator connected to some kind of water wheel? If I were to rectify the current into DC to charge a battery, then would that be any better? Let's say there was a 12V, 105 A, 5000 RPM alternator. Would that make this any easier dealing with AC current?
  2. W

    DC Motor Generator: Understanding Voltage and Current | FAQs

    Ok, I'm new to electronics and have some pretty simple questions that I can't seem to find answers to elsewhere. Let's say I have a DC motor that I want to use as a generator with the following specifications: 130 VDC 17 A 5950 RPM I know that in order to generate 130 Volts, that would...
  3. W

    Undergrad How Do You Calculate the Electric Field Ex at a Point in a Voltage Field?

    And how would I do that?
  4. W

    Undergrad How Do You Calculate the Electric Field Ex at a Point in a Voltage Field?

    Here is the problem: Given that electric potential is given as a function of x and y: V(x,y)=20x4 + 60y3 What is Ex at (2,1)? I have tried using E=-DV/DV, but I keep getting confused on how to derive this as it's been a while since I took calculus. I am also unsure of how to plug in the...