Search results

  1. T

    Question about waves, maybe diffraction related

    Remember, it's the wavelength, not the amplitude of the light wave... If the aperture is smaller than the wavelength, there would be maximum diffraction - the central bright fringe would fill the entire screen!
  2. T

    Error in drift Formula of Current?

    Error in drift Formula of Current?? Drift velocity, vd = eEτ/me Drift velocity, as in the current formula I=nevdA should correspond to the average velocity with which the electrons are moving in the steady current, but the formula at top gives the mean FINAL velocity achieved by the...
  3. T

    Why don't we take drift velocity as the average velocity of electrons?

    Drift velocity, vd = eEτ/me Drift velocity, as in the current formula I=nevdA should correspond to the average velocity with which the electrons are moving in the steady current, but the formula at top gives the mean FINAL velocity achieved by the electrons in short spurts of time(mean...
  4. T

    Why isn't CHARGE a fundamental quantity rather than CURRENT?

    Almost all physics or engineering textbooks have a table of the SI units that are based on six fundamental quantities. The one that is listed for the quanity "electric current" is always "ampere". However, usually a few pages past this fundamental table lies a definition of the ampere. 1...
  5. T

    WHY does CURRENT attain STEADY state?

    nice insight! But i guess ur talking about the setting up of electric field as soon as the potential difference is created. And, by definition, current is the volume flow rate of the charge carriers across a cross section, which remains constant. By the way, the energy that is transferred as...
  6. T

    WHY does CURRENT attain STEADY state?

    Thanks guys!....@K^2: Is the pressure differential is less across the larger area section because the flow is steady or the other way?
  7. T

    WHY does CURRENT attain STEADY state?

    When charges are flowing (current) through a combination of conductors of different resistances in series, then why don't the charges flow faster(more current) in the material with lower resistance and slower(less current) in high resistance material? Why is the current same(steady) in the whole...
Top