Recent content by jk0921

  1. J

    Measuring Capacitance given a voltmeter + ammeter

    This is just an assumption that I thought: Hope it helps The ammeter is recording current as a function of time, so the reading is actually I/t. From here we can calculate Q. Q = I from ammeter readings . t the I is the reading from the ammeter, so it becomes Q = I/t . t the t cancel out so...
  2. J

    Integrating dq to find that q(r) = Q(1-e^(-r/R))

    Homework Statement provided with data that dq = rho(r) *4phi*r^2*dr rho(r) = [Q*e^(-r/R) / 4phi R *r^2) I have to show that the charge q(r) enclosed in a sphere of radius r is q(r) = Q(1-e^(-r/R)) by using appropriate integral. how the integral should be? Homework Equations The...