Magnetic torque Definition and 16 Threads

Disclaimer: The solution to this question has already been posted by my instructor. I made this post to understand why my solution is wrong or if the instructor is wrong, since their explanation does not make sense to me. My reasoning: Using the fact that the magnetic torque on a...

I am confused with the concept of Torque handled differently in books, Concept1: If a loop is placed in a magnetic field and the current flowing in the loop is ##I## there will be force and torque acting on the loop given by ##F = I \vec l \times \vec B ##. The torque is given by ##\tau =\vec...

Homework Statement Homework Equations m=N*I*A T=m X B m = n(unit vector) *m The Attempt at a Solution To calculate m, I know it is just plugging in the information. Thus, m=0.8. Now, the question is computing the unit vector, which has me confused. Using the right hand rule, and going along...

Homework Statement If a shunt of 1/10th of the coil resistance is applied to a moving coil galvanometer,then it's sensitivity becomes (a)10 fold (b)11 fold (c)1/10 fold (d)1/11 foldHomework Equations ϕ / I = NAB/LThe Attempt at a Solution [/B] So sensitivity gets increased by only these...

Homework Statement A cylindrical bar magnet whose mass is 0.08 kg, diameter is 1 cm, length is 3 cm, and whose magnetic dipole moment is <5, 0, 0> A · m2 is suspended on a low-friction pivot in a region where external coils apply a magnetic field of <1.4,0,0> T You rotate the bar magnet...

I'm trying to derive a formula for the magnetic torque on a semicircular loop. what I've done so far is this The magnetic force on the non-curved loop is $\vec{F}_{x}=\int Idx\hat{i}\times B_{\circ}\hat{i}=0N$ for the curved loop $\vec{F}_{c}=\int_{0}^{\pi} Ird\phi\hat{\phi}\times...

Hello, Suppose sinosodial AC and pulsed DC magnetic fields with equal rms are applied on animal cells in the presence of magnetic nanoparticles. For the mean field strengths to be equal, the peak value of the square wave (with 50% duty cycles) must be sqrt. 2, which means that the maxiumum...

i'm having a hard time understanding why potential energy is 0 when u(mu) is perpendicular to B(mag field). Isn't the torque at max when the angle between u and B is 90? and there for has potential to do work all the way until the angle is 0. The way my mind sees it is, since there is a torque...

Homework Statement Hello, When a current carrying loop (of any shape) is placed in a uniform magnetic field B , the field is given by MχB where M is the magnetic moment vector I*A where I Is current and A is the area vector. I want to know at which point or for which axis is the torque...

1. when there is a current in a loop and it is placed in a magnetic field then there will be the torque on it along the direction of mxB axis.but that axis will pass through which point.will that torque act through the center of the loop only?? 2. suppose a current (I) carrying loop (of R)is...

Hi. I have a question concerning the magnetic momentum of a current loop. We know that if we have a circular current loop (a solenoid with N=1), there is a magnetic moment (mu) in the center of the loop given by "mu=S I" (I=current, S =surface enclosed by the loop). So, if there is an external...

Homework Statement please refer to this website http://www.nikhef.nl/~h73/kn1c/praktikum/phywe/LEP/Experim/4_3_04.pdf bascially it wants me to measure torque as a function of 1) strength of magnetic field between 2 helmholtz current coil (constant b-field) 2) angle between the magnetic...

Homework Statement A current I flows in a plane rectangular current loop with height a and horizontal sides b. The loop is placed into a uniform magnetic field \vec{B} in such a way that the sides of length a are perpendicular to \vec{B} (Part A 1 figure), and there is an angle \theta between...

A plastic circular loop of radius R and a positive charge q is distributed uniformly around the circumference of the loop. The loop is then rotated around its central axis, perpendicular to the plane of the loop, with angular speed omega. If the loop is in a region where there is a uniform...

[SOLVED] Magnetic torque on sphere on inclined plane Homework Statement a nonconducting sphere has mass 80 g and radius 20 cm. a flat, compact coil of wire with 5 turns is wrapped tightly around it, with each turn concentric with the sphere. the sphere is placed on an inclined plane that...

Hello All, I have Maxwell 3D on my computer and I want to use it to do some 3D magnetic torqure analysis on some magnet designs that I am working on. I have created a model that I would like to simulate in AutoCAD and I want to transfer it to Maxewell to do the analysis. But I am not sure how...