Rankers Physics

Bar Magnet: Practice Problem & Solution

A square coil of side ‘a’ carrying current ‘ i ’ and is having one of its side AB parallel to y-axis and its plane is at angle θ = 30° with x-axis. If a uniform magnetic field B exist in the region along \[\hat{k}\] direction, then torque due to magnetic force on the coil is: Bar Magnet diagram: A square coil of side ‘a’ carrying current
\[\frac{ia^{2}B}{2}\hat{j}\]
\[-\frac{ia^{2}B}{\sqrt{2}}\left(-\hat{k}+ \hat{j} \right)\]
\[-\frac{ia^{2}B}{2}\hat{j}\]
\[\frac{ia^{2}B}{2}\hat{i}\]

No solution provided for this question.

Leave a Reply

Your email address will not be published. Required fields are marked *

Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. As shown in the figure, the radius of each of quarter circular arc is 2m. Find the magnetic moment of the given loop for the current in the loop :
2. Two bar magnets with magnetic moments 2M and M are fastened together at right angles to each other at their centres to form a crossed system, which can rotate freely about a vertical axis through the centre. The crossed system sets in earth's magnetic field with magnet having magnetic moment 2M making and angle θ with the magnetic meridian such that :
3. Assertion (A): When a magnet is brought near iron nails, only translatory force act on it. Reason (R): The field due to a magnet is generally uniform.  
4. In the given diagram, ratio of magnetic field at point A and B will be :
5. A bar magnet of length 'l' and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be :