AP EAMCET · PHYSICS · Magnetic Effects of Current
A magnet of magnetic moment \(M\) is rotated through \(360^{\circ}\) in a magnetic field \(H\), the work done will be
- A \(\mathrm{MH}\)
- B \(2 M H\)
- C \(2 \pi M H\)
- D 0
Answer & Solution
Correct Answer
(D) 0
Step-by-step Solution
Detailed explanation
Work done to rotate magnetic dipole in magnetic field from angle \(\theta_1\) to \(\theta_2\) is given as \(W=M B\left(\cos \theta_1-\cos \theta_2\right)\) Here, \(\theta_1=0^{\circ}\) and \(\theta_2=360^{\circ}\)…
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