Recent content by peanutbutter

I am solving the Hydrogen wavefunction using FORTRAN. Now using the Euler method, I am given a solution to match which is given by u10(r) = 1.06r*exp(-3.74r) (where unl(r) = rRnl(r) in general) which says it has a normalisation chosen to match what i should get from my code. Then I use the...

I am solving the Hydrogen wavefunction using FORTRAN. Now using the Euler method, I am given a solution to match which is given by u10(r) = 1.06r*exp(-3.74r) (where unl(r) = rRnl(r) in general) which says it has a normalisation chosen to match what i should get from my code. Then I use the...

Thanks for the boost in confidence, I've worked it out now anyway.

A semiconductor material has an intrinsic carrier concentration of 5.6 x 10^14 m^-3 at 300K. What is the electron concentration when such a semiconductor is p doped with an acceptor concentration Na = 3.9 x 10^18 m-3. I have no idea how to approach this question without a value for the...

Homework Statement An amplifier has negative feedback applied to it such that feedback fraction is 0.5%. If the open loops gain of the amplifier is 10^5 what is the closed loop gain? I get this as 199.6 The amplifier is connected to a signal source of internal resistance 300kohms which...

Homework Statement An amplifier has negative feedback applied to it such that feedback fraction is 0.5%. If the open loops gain of the amplifier is 10^5 what is the closed loop gain? I get this as 199.6 The amplifier is connected to a signal source of internal resistance 300kohms which...

Can anyone help?

Homework Statement An amplifier has negative feedback applied to it such that feedback fraction is 0.5%. If the open loops gain of the amplifier is 10^5 what is the closed loop gain? I get this as 199.6 The amplifier is connected to a signal source of internal resistance 300kohms which...