KCET 2019 Physics Solved Paper
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Question : 26 of 60
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A magnetic needle has a magnetic moment of 5 × 10 – 2 A m 2 and moment of inertia 8 × 10 – 6 k g m 2 . It hasa period of oscillation of 2 s in a magnetic field
. The magnitude of magnetic field is approximately
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