A magnet makes 40 oscillations per minute at a place having magnetic f – McqOptions

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1.	A magnet makes 40 oscillations per minute at a place having magnetic field intensity of 0.1 ´ 10?5 T. At another place, it takes 2.5 sec to complete one vibration. The value of earth?s horizontal field at that place is [AIIMS 2000; CPMT 2000; Pb PET 2002]
A.	0.25 ´ 10?6 T
B.	0.36 ´ 10?6 T
C.	0.66 ´ 10?8 T
D.	1.2 ´ 10?6 T
Answer» C. 0.66 ´ 10?8 T

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