AP EAMCET · PHYSICS · Magnetic Effects of Current
A magnet of magnetic moment \(2 \mathrm{~J} \mathrm{~T}^{-1}\) is aligned in the direction of magnetic field of \(0.1 \mathrm{~T}\). What is the net work done to bring the magnet normal to the magnetic field?
- A \(0.1 \mathrm{~J}\)
- B \(0.2 \mathrm{~J}\)
- C \(1.0 \mathrm{~J}\)
- D \(2.0 \mathrm{~J}\)
Answer & Solution
Correct Answer
(B) \(0.2 \mathrm{~J}\)
Step-by-step Solution
Detailed explanation
Given that, magnetic moment, \(M=2 \mathrm{JT}^{-1}\) Magnetic field, \(B=0.1 \mathrm{~T}\) Since, magnetic moment is aligned in the direction of magnetic field, i.e. initial angle, \[ \theta_1=0^{\circ} \] When magnet is normal, then final angle, \(\theta_2=90^{\circ}\) Using…
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