A thin magnetic needle vibrates in the horizontal plane with a p – McqOptions

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1.	A thin magnetic needle vibrates in the horizontal plane with a period of 4 s. The needle is cut into two halves by a plane normal to magnetic axis of the needle. Then the period of vibration of each half needle is approximately
A.	4s
B.	2s
C.	8s
D.	1s
Answer» C. 8s

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