More about Magnetic Dipoles
Trending Questions
Q. Each side of the cube is L then the magnitude of magnetic dipole moment of the loop oabcdeo carrying current i as shown in figure is
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/418372/original_14.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/418372/original_14.png)
- iL2
- √2 iL2
- √3 iL2
- 0
Q. A current carrying loop is placed in a uniform magnetic field in four different orientation:I, II, III & IV. Arrange them in the decreasing order of their potential Energy.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/14918/content_31.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/14918/content_31.png)
- I > III > II > IV
- I > II >III > IV
- I > IV > II > III
- III > IV > I > II
Q. A steady current I flows in a small square loop of wire of side L in a horizontal plane. The loop is now folded about its middle such that half of it lies in a vertical plane. Let →μ1 and →μ2 respectively denote the magnetic moments due to the current loop before and after folding. Then:
Q. Magnitude of magnetic dipole moment of loop as shown in figure is? Each curve is of radius R.
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/418426/original_JEE_Q19.png)
![](https://s3-us-west-2.amazonaws.com/infinitestudent-images/ckeditor_assets/pictures/418426/original_JEE_Q19.png)
- πR2i
- 2πR2i
- πR2i2
- 34πR2i
Q. Two short bar magnets of magnetic moments ‘M′ each are arranged at the opposite corners of a square of side ‘d′ such that their centres coincide with the corners and their axes are parallel to one side of the square. If the like poles are in the same direction, the magnetic induction at any of the other corners of the square is.
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/766655/original_13.PNG)
- μoM4πd3
- μo2M4πd3
- μoM2πd3
- μo2M2πd3
Q. 32. The magnetic induction in air at a distance d from an isolated point pole of strength m unit will be
(a) (b) (c) md (d) md2
33. A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60°. The torque required to maintain the needle in this position will be
(a) (b) (c) md (d) md2
33. A magnetic needle lying parallel to a magnetic field requires W units of work to turn it through 60°. The torque required to maintain the needle in this position will be
Q. A circular current carrying coil has a
radius R. The distance from the centre of
the coil on the axis where the magnetic
induction will be 1 th 8 to its value at the
centre of the coil, is
Q. The geometrical length of a bar magnet is 1.4cm. what is its magnetic length?
Q. A magnet of moment 4.0 Am2 is held in a uniform magnetic field 5.0×10−4 Tesla with the magnetic moment vector making an angle of 30∘ with the field. The work done in increasing the angle from 30∘ to 45∘ is nearly
- 3.18×10−4 J
- 4.3×10−4 J
- 7.3×10−4 J
- Zero