A magnetic needle has magnetic moment 5.8 × 10 –2 A m 2 and moment of inertia of 7.8 × 10…
Physics · Class 12 · CBSE — Magnetism and Matter
A magnetic needle has magnetic moment 5.8 × 10–2 A m2 and moment of inertia of 7.8 × 10–6 kg m2, it performs 12 complete oscillations in 6.0 s. What is the magnitude of magnetic field?
- 0.011 T
- 0.021 T
- 0.031 T
- 0.041 T
Answer
(B) 0.021 T
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