Recent content by wr1015

ooooooohhhh ok, but why isn't it already in T/s??

oops sorry that was supposed to have \pi in there, i didn't forget it in my calculation

(-.01-.02)/(10-5) = -.006 dropping the sign: (181) (.006) \pi (.01955^2) i get .001303 V but that's not right :confused: edit: fixed

can anyone help me?

A magnetic field with the time dependence shown in Figure 23-38 is at right angles to a 181 turn circular coil with a diameter of 3.91 cm. What is the induced emf in the coil at each of the following times? (a) t = 2.50 ms 0 V (b) t = 7.50 ms (c) t = 15.0 ms...

ahh yes I don't why I thought finding the final flux was finding the rate of change :redface: thank you for clearing that up

anyone else?

i did: 19.8 = 1 ((\phi_{f} - 1.242E-4)/(1)) \midE\mid = 19.8 V N = 1 \phi_{i} = 1.242E-4 T \Deltat = 1s

A conducting loop of wire has an area of 6.9 10-4 m2 and a resistance of 110\Omega . Perpendicular to the plane of the loop is a magnetic field of strength 0.18 T. At what rate (in T/s) must this field change if the induced current in the loop is to be 0.18 A? here's what I've done so far...

:redface: i see what you mean now.. thank you for your help, i really wished my book and professor would've explained this a lot better especially when dealing with different planes

so ((.034) (.36*.36) (cos 22)) + ((.034) (.24 *.36) (cos 68)) ??

90-22 = 68.. right?

yes it looks like it will eventually go through the xy plane

i don't understand what you're talking about... all i know is that if the loop is perpendicular to the field \theta = 0 and if its parallel \theta = 90 are you supposed to do 2 separate flux calcualtions (one for each plane) and add them accordingly?

don't you mean the yz plane?? the magnetic field doesn't have any x-component