STANDARDPhysics-Magnetism and Matter
STANDARD Physics Magnetic Moment MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Magnetic field at the centre of a circular loop of area A is B. The magnetic moment of the loop is
A
BA²/μ₀π
B
BA/√A
C
BA√A/μ₀
D
2BA√A/μ₀π
Correct Answer
Option D
Detailed Explanation
Let r be the radius of the circular loop. Therefore, A = πr² or r = √(A/π). The magnetic field at the centre of the loop is given by B = (μ₀I)/(2r). Solving for the magnetic moment, we find it to be 2BA√A/μ₀π.
Found an issue with this question?
Related Questions
More from
When a bar magnet is placed in a uniform magnetic field, what is the expression for the torque acting on it?
Bar MagnetPhysics
When a bar magnet is placed in a uniform magnetic field, which of the following statements is true regarding the torque acting on the magnet?
Bar MagnetPhysics
Which of the following statements about magnetic properties of materials is correct?
Magnetic Properties of MaterialsPhysics