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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 × 10–2Am2 and moment of inertia 8 × 10–6kgm2. It hasa period of oscillation of 2 s in a magnetic field
→
B
. The magnitude of magnetic field is approximately
Validate
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