Question:

A closely wound solenoid of $1000$ turns and area of cross section $1.4 \times 10^{-4}\, m^2$ carrying a current of $3 \,A$ is suspended through its centre allowing it to turn in a horizontal plane. The magnetic moment associated with this solenoid is

Updated On: Jun 23, 2023
  • $0.22\,J \,T^{-1}$
  • $0.32\,J \,T^{-1}$
  • $0.42\,J \,T^{-1}$
  • $0.52\,J \,T^{-1}$
Hide Solution
collegedunia
Verified By Collegedunia

The Correct Option is C

Solution and Explanation

Here, $n = 1000$, $A = 1.4 \times 10^{-4} \,m^{2}$, $I = 3\, A$
Was this answer helpful?
0
0

Top Questions on Magnetism and matter

View More Questions

Notes on Magnetism and matter

Concepts Used:

Magnetism & Matter

Magnets are used in many devices like electric bells, telephones, radio, loudspeakers, motors, fans, screwdrivers, lifting heavy iron loads, super-fast trains, especially in foreign countries, refrigerators, etc.

Magnetite is the world’s first magnet. This is also called a natural magnet.  Though magnets occur naturally, we can also impart magnetic properties to a substance. It would be an artificial magnet in that case.

Read More: Magnetism and Matter

Some of the properties of the magnetic field lines are:

  • The lines and continuous and outside the magnet, the field lines originate from the North pole and terminate at the South pole
  • They form closed loops traversing inside the magnet. 
  • But here the lines seem to originate from the South pole and terminate at the North pole to form closed loops.
  • More number of close lines indicate a stronger magnetic field
  • The lines do not intersect each other
  • The tangent drawn at the field line gives the direction of the field at that point.