A thin magnet oscillates with time period T in external magnetic field. If it is cut into four symmetrical parts, the time period of each piece in the same magnetic field will be
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a
T
b
T2
c
T4
d
T22
answer is B.
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Detailed Solution
T=2πIMB where I=mL212T′=2πI′M′B=2πI16×M4×B=T2 where m=m4,I′=I2
A thin magnet oscillates with time period T in external magnetic field. If it is cut into four symmetrical parts, the time period of each piece in the same magnetic field will be