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.(adsbygoogle = window.adsbygoogle || []).push({});

I don't understand why this isnt 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.

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# What is the magnitude of the torque acting on the loop? T = IAB

**Physics Forums | Science Articles, Homework Help, Discussion**