- #1
skyesthelimit
- 5
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- Homework Statement
- What is the magnitude of the torque on the circular current loop?
- Relevant Equations
- Torque =IAxB=IABsin(theta)
r=3cm
So I'm having a little trouble getting to the solution to this question so here's my attempt at a solution and I'm not seeing the issue with it
1. I calculated the B-field due to the long wire (approximating the distance from the dipole to be equivalent to that in the centre since r>d)
B= μ0*I/(2πr) = 1.3367E-5
2. Calculated μ0 =IA =0.2*(πr^2) =0.2*[π*(1E-3)^2] = 6.28312E-6
3. Calculated torque using IAB = 1.7E-11 (since theta =90 degrees)
However, that's not the right answer and I'm a little lost as to why. Could someone point me in the right direction please? Thanks!
1. I calculated the B-field due to the long wire (approximating the distance from the dipole to be equivalent to that in the centre since r>d)
B= μ0*I/(2πr) = 1.3367E-5
2. Calculated μ0 =IA =0.2*(πr^2) =0.2*[π*(1E-3)^2] = 6.28312E-6
3. Calculated torque using IAB = 1.7E-11 (since theta =90 degrees)
However, that's not the right answer and I'm a little lost as to why. Could someone point me in the right direction please? Thanks!