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Q.

Is it true that the effective length of a pendulum is the distance between the point of suspension and the centre of gravity of the bob?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is true.
The effective length, L, is the measurement between the point of suspension and the spherical bob's centre of gravity (centre of gravity), L=l+r+ where l is the length of the string from the top of the bob to the hook, e is the length of the hook, and r is the radius of the bob.
 
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