Recent content by number14

solved it!

Homework Statement Determine the speed of an electron in a hydrogen atom (radius .5 * 10^-10 m) and state if it is relativistic. (Treat the electron as through it were in a circular orbit around the proton.) (Given that .1c and greater is relativistic) Homework Equations not sure... L=L0...

thanks so much for the help, i got the right answer finally!

Wait, this time i got 1.2*10^-5 . I'm using a calculator that is very finicky.

B=3.3*10^-4

I used B=(mu_0 *N*I)/l delta_flux = B*pi*r^2 and Emf=-N * delta_flux/delta_t N=15, I=3.1, l=.18, delta_t=.28 , r=.0145 and I got: 3.6 * 10^-5

Homework Statement A 800-turn solenoid, 18 cm long, has a diameter of 2.9 cm. A 15-turn coil is wound tightly around the center of the solenoid. If the current in the solenoid increases uniformly from 0 to 3.1 A in 0.28 s, what will be the induced emf in the short coil during this time...