Recent content by Peter Andrews

  1. Peter Andrews

    Finding displacement current in an AC capacitor circuit

    Exactly. Constant and uniform have different meanings, at least in fields.
  2. Peter Andrews

    Finding displacement current in an AC capacitor circuit

    But how can we assume electric field to be constant when the charge is changing? The electric field in a capacitor is σ/ε. σ arial charge density. If we use that, then: Φ = A.E = Q/ε Now differentiating, (dΦ/dt) = (DQ/dt)/ε So ε(dΦ/dt) = (DQ/dt) Hence Idisplacement is dq/dt following which I...
  3. Peter Andrews

    Finding displacement current in an AC capacitor circuit

    Can use the Gauss theorem, qenclosed/ε = ∫E.ds (closed integral, I don't know how to insert that sign). But what Guassian surface to choose?
  4. Peter Andrews

    What are the Best Fields for a Physics and Computer Science Student to Pursue?

    I'm a student from India and I'm studying to clear the IIT-JEE. I study physics, chemistry, maths, and computer science. I enjoy physics and computer science and I want to work in either of these fields. I also enjoy mathematics but my aptitude is not in it. Inorganic chemistry is not my area of...
  5. Peter Andrews

    Finding displacement current in an AC capacitor circuit

    Homework Statement A capacitor is made of two parallel plates of area A, separation d. It is being charged by an AC source. Show that the displacement current inside the capacitor is the same as the conduction current. Homework Equations Idisp = ε(dΦE/dt) Q = CV C = Aε/d Xc = 1/(2πƒC) Q(t)...
  6. Peter Andrews

    Finding the angular spread of a diffraction minima?

    1. Homework Statement Light of wavelength 6000Å illuminates a single slit of width 10-4m. Calculate the angular spread of first diffraction minima.Homework Equations d*y/D = nλ Y = nλ/a for minima Y = (2n±1)λ/a for maxima Y stands for the position on screen, d is slit width and D is separation...