Torsional rigidity | The twisting Couple per unit twist | Video in HINDI | EduPoint

In this video in Hindi we discussed about the torsional rigidity of an object. Torsional rigidity is also known as the twisting couple per unit twist. As the name suggests it is the amount of twisting couple or torque required to twist the object by one unit angle, i.e., one radian. In this lesson we found out the twisting couple required to twist a cylinder by one radian.
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Thank you Mr. Khan ! And .... You are welcome. I shall definitely upload videos on radioactivity very soon. Keep in touch.
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sir kya torsional constant ko add kar sakte hain do alag section ke ?

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+Dev Bhattarai
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+Dev Bhattarai
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[@durgapodobhakat2910]

distinguish between Torsional rigidity and flexure rigidity ? ke vare me bata sakte hai kya...

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There is a video related to flexural rigidity. Please search with the following search term 'Flexural rigidity edupoint'.
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Hello Shivank Rai !
Yes! I shall.
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Why area is 2πx.dx ?

[@mukulsharma2926]

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[@chowdhurychowdhury8019]

cylindrical lateral area is = 2πrl..
r is x
here, l is dx.

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No you are wrong choudhary choudhary

[@insanetechnology6933]

I am giving the right answer see below

[@insanetechnology6933]

Area of the face of hollow cylinder=pi(x+dx)ka whole square-pi(x)ka whole square
=pi (x square +dx square +2 x dx)-pi xsquare
Here we neglect dx square because square of small quantity becomes too small
Now
Pi x square +pi (2 x dx)-pi x square
Pi x square is cancell
So,we have 2pi x dx

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