Recent content by nicholasjgroo

Homework Statement If the electric field is E and div.ξ=ρ/ϵ_0 where ξ=-dV/dx show that the capacitance is C=(ϵ_0 A)/d because i don't know how to type it I'm representing ξ with E for the electric field The Attempt at a Solution I've done this as two two...

i'm thinking the electrons arent uniformly distributed they're like a blob and the distribution of the electrons is modeled by the gaussian distribution but i can't figure out what he means by 'over what distance does the electric field change'

ok, spent the last 2 hours on this and here's what I've got. the equation I've got for electric is the charge density divided by the permitivity of free space for the change in electric field across the cloud E=q/4(pi)epsilon nought r squared. and for the last bit i don't have a clue, i know...

this may seem stupid but i can't remember is the charge in a capacitor stored within the plates or on top of the plates?

Homework Statement A very short pulse UV laser is used to liberate a number of electrons from the negative plate in the arrangement in (i) above. The electrons drift towards the positive plate under the influence of the electric field over a time scale much longer than the laser pulse...

Homework Statement we're measuring the quality factor of a LRC circuit and trying to find delta w for the resonant frequency curve Homework Equations according to the notes we were give the 'bandwitch' is measure between the points where the volatge falls to v(output)/suare root 2...

Homework Statement the vectors a and b Homework Equations find a vector which is perpendicular to the plane containing vectors a and b The Attempt at a Solution do i find the vector product of a and b and then find something that's parallel to that or...?