Recent content by AlejandroDes

  1. A

    Undergrad Energy in a Capacitor: Explained

    I think someone already posted the link but this video might answer your questions: https://www.khanacademy.org/science/physics/circuits-topic/circuits-with-capacitors/v/energy-capacitor The total stored energy is half the potencial energy because you lose voltage while discharging the...
  2. A

    Graduate Time Dilation and different clock types

    Imagine you have 2 pendulums (they are exactly alike, same period) that you use to measure time, then you take the pendulum #2 and move it at certain speed relative to the pendulum #1. If you record the total amount of distance that the ball on pendulum #2 traveled over a period we willl see...
  3. A

    Undergrad Voltage in Circuits: Explaining Voltage Drops & Flow

    I think you're getting confused because you are trying to compare the voltage (electric potencial) with the energy of a mass at certain height (potencial energy). They are not the same thing (the units are not the same). Imagine you have a mass at a certain height the Potencial energy would be...
  4. A

    Undergrad Induced Voltage in an unclosed loop

    I read the following problem on a textbook: A airplane flies at a constant speed of 680m/s perpendiculary to Earth's magnetic field (of 5x10^-5 T). The wingspan of the airplane is 9.8m. What is the induced voltage? The answer the book gives is: E = BLv = 0.4066V But I've been wondering if this...