- #1
joej
- 29
- 0
1. a 31-cm-diameter coil consists of 20 turns of copper wire 2.6mm in diameter. A uniform megnetic field perpendicular to the plane of the coil, changes at a rate of 8.65 x 10 ^ -3 T/s
What is the current and what is the rate at which thermal energy is produced?
now I figured this would be similar to emf induced in a moving conductor, thus that would give me the emf in volts and I could calculate the current using V = IR, however that dos not seem to give me the correct answer.
I am currently trying to figure out which forumula(s) to use to get an answer to this question... however nothing that I've tried so far seems to work.
---------------------------------------------------
2. What voltage is needed to produce electron wavelength of .10nm? (assume electrons are nonrelativistic)
here I tried to use the following 2 forumulas:
wavelength = Planck's constant / (mass * velocity)
and
eV = .5 mv^2
now I used the 1st formula to to get v = ...
and inserted that into the 2nd formula to get
eV = .5m ((wavelength * m) / (Planck's constant))^2
now I convert from eV to Volts but... answer is way off... where am I going wrong here?
What is the current and what is the rate at which thermal energy is produced?
now I figured this would be similar to emf induced in a moving conductor, thus that would give me the emf in volts and I could calculate the current using V = IR, however that dos not seem to give me the correct answer.
I am currently trying to figure out which forumula(s) to use to get an answer to this question... however nothing that I've tried so far seems to work.
---------------------------------------------------
2. What voltage is needed to produce electron wavelength of .10nm? (assume electrons are nonrelativistic)
here I tried to use the following 2 forumulas:
wavelength = Planck's constant / (mass * velocity)
and
eV = .5 mv^2
now I used the 1st formula to to get v = ...
and inserted that into the 2nd formula to get
eV = .5m ((wavelength * m) / (Planck's constant))^2
now I convert from eV to Volts but... answer is way off... where am I going wrong here?