Hi this is the first time i've posted something don't know how long it usually take for replies but any help would be muchly apprecitated.(adsbygoogle = window.adsbygoogle || []).push({});

This question asks: A long solid cylinder, radius R, carries uniform charge density p. the cylinder is rotating around the cetral axis with constant angular velocity omega(vector) = omega * z (unit vector)

the first qustion asks to calculate the current density vector in the cylinder...

heres what I have done,

I know that the equation to use is J(vector) = p * Vd, where Vd is the drift velocity and it can defines by several ways, Vd= (eE(tal)/m) or Vd = I/(NAe) where N is the number of free electrons per unit volume in conductor, A is the cross section area and e is simply the charge of the electron, so I don't know if I should or how to interpert the angular velocity into the drift velocity and then to actually "calculate" the current density vector. Just need some guardance thanks

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# Homework Help: Current density vector

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