Q.

A triangular rigid wire frame ' AOB ' is made in which length of each wire is l and mass is m. The whole system is suspended from point O and free to perform SHM about x-axis or about z-axis. When it performs SHM about x-axis its time period of oscillation is T1 and when it performs SHM about z-axis , its time-period of oscillation is T2 .Then choose the correct option. 

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a

T1<T2

b

T1=T2

c

None

d

T1>T2

answer is A.

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Detailed Solution

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 Time  period=Imgd
Mgd = constant for both situation.
Moment of inertia about x-axis is less than the
Moment of inertia of about z-axis.
So  Ix<Iz,  so  T1<T2.            
 

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A triangular rigid wire frame ' AOB ' is made in which length of each wire is l and mass is m. The whole system is suspended from point O and free to perform SHM about x-axis or about z-axis. When it performs SHM about x-axis its time period of oscillation is T1 and when it performs SHM about z-axis , its time-period of oscillation is T2 .Then choose the correct option.