Recent content by jackxxny

my question really is how do i account for all of the wires?

the problem really states... ...that the electron follows a circular path of diameter 1.57 cm near the center of an evacuated solenoid of length 35 cm . does that changes anything?

v=1570 m/s d = 1.57 cm x = 35 cm I = 2.61 A what I did is : N=(vmx)/(rQI*4*pi*10^-7)

the only weird thing is that i get a number like .121 and it is not a turn .121? or it can be a valid answer?

Homework Statement I have a cylinder with 12 long parallel wires placed at the position of the hour on the clock. each wire carries the corresponding hour in amperes. example the wire at 1 o'clock carries 1 A, the one at 2 carries 2 A and so on. i need to find the magnetic field at the...

Homework Statement I have a linear dielectric material. The electric field in the material is 38% less than a vacuum field with the same external sources. I need to find the susceptibility of the material? Homework Equations I used P=\epsilon\chi(vacuum)E P=\epsilon\chi(material).62EThe...

Homework Statement I have the following information about the problem. i have the speed of an electron = v the diameter of a circular path = d the length of a solenoid = x the current that the solenoid carried = I I need to find the number of turns in the solenoid. Homework Equations i...

ok i got the charge density how do i do the potential so how do i do this integral dV = - dE*dr

the problem gave a number for charge density so should i pull the number in front of the integral and do \int between 0 and x of 4 \ pi r^2 da ??

E =integral rho d tau/((4πr2)*ε0) sorry i simplify for E how do i do the integral of rho d tau?

i think i kinda got it ε0*E (4πr2)=qenclosed i can then substitute qenclose= integral rho d tau then take the derivative on both sides right?

gauss law for a sphere is E= pR3/(3eor2) that's all i have to do?

what about the electric field...i am so lost...

4/3 R^3 \pi \rho = 4R^2 \pi \epsilon_0 E_s so i just set it equal to each other and solve for p \rho = 3 \epsilon_0 E_s / R is that it?

no. I thought since the problem said that it is linearly that might work?