TS EAMCET · Physics · Magnetic Effects of Current
A thin magnetic needle is placed in a magnetic field of 200 G with its axis at 30° to the direction of the field. Find the magnetic moment of the needle if it experiences a torque of 0.012 Nm in this field.
- A \(1.2 \mathrm{Am}^2\)
- B \(12.0 \mathrm{Am}^2\)
- C \(0.6 \mathrm{Am}^2\)
- D \(6.0 \mathrm{Am}^2\)
Answer & Solution
Correct Answer
(A) \(1.2 \mathrm{Am}^2\)
Step-by-step Solution
Detailed explanation
Magnetic field, \(\mathrm{B}=200 \mathrm{G}=200 \times 10^{-4} \mathrm{~T}\) We have Torque \(\tau=m B \sin \theta\)…
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