Q.

A long bar magnet of time period T is cut into four equal parts by cutting it perpendicular to both length and breadth. The time period of each part is

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a

T/4

b

T/16

c

T/32

d

T/2

answer is D.

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Detailed Solution

MI, I=ml212 ; I1I=14 x 14 ; M1M=14TT1=M1IMI1=4=2 ; T1=T2
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