Recent content by jhexp

nvm, got it.

Ah shi. How dumb of me. Just after posting I realized that I should multiply the inductance by the current and got the correct answer.

Homework Statement A 4.50 mH toroidal inductor has 125 identical equally spaced coils. 4.5 mH = .0045 H (Wb/A) N = 125 I = 11.5 A φ = ? - this is what we're finding If it carries an 11.5 A current, how much magnetic flux passes through each of its coils? Homework Equations I'm really blank...

Oh yeah, do you guys know the specific right hand rule for this situation? I need to use it to figure out the direction of this proton.

Proton's Velocity Homework Statement What is the speed of the proton? Homework Equations B=u0qv/(4pir^2) The Attempt at a Solution I rearranged the equation so that I solve for velocity, v. I determined that r^2 is 1.8*10^-5 m. I plugged in 1.1*10^-3 for B. The q for the...

How was the equation Pr/2ε0 derived? I have a similar problem and the formula appears to be correct, but I'd like to know how you get to it I know E = Q/ε0 = (PV)/(Aε0) = (P*pi*r^2)/(ε0(2*pi*r^2+2*pi*r*L)) I separated the equation into two and got P*L/(2*ε0)+P*r/(2*ε0). Why is it that only...