- #1
mr_coffee
- 1,629
- 1
A circular wire loop of radius 20.0 cm carries a current of 3.10 A. It is placed so that the normal to its plane makes an angle of 34.0° with a uniform magnetic field of 15.0 T.
I don't understand why this isn't right, i got the first part right, it wanted me to find the magnetic dipole moment of the loop, which i found to be .3896 Am^2; I got this by using M = IA;
now it wants me to find the magnitude of the torque acting on the loop. So I used the formula:
Torque = IAB;
I = current
A = area of loop
B = Magnetic field;
Torque = (3.10)(PI*.20^2)(15) = 5.84 Nm, which is wrong, any ideas why?
Thanks.
I don't understand why this isn't right, i got the first part right, it wanted me to find the magnetic dipole moment of the loop, which i found to be .3896 Am^2; I got this by using M = IA;
now it wants me to find the magnitude of the torque acting on the loop. So I used the formula:
Torque = IAB;
I = current
A = area of loop
B = Magnetic field;
Torque = (3.10)(PI*.20^2)(15) = 5.84 Nm, which is wrong, any ideas why?
Thanks.