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HomePhysics19. Let  be the moment of inertia of an uniform square plate about an axis AB that passes through its centre and is parallel to two of its sides. CD is a line in the plane of the plate that passes through the centre of the plate and makes an angle θ  with AB . The moment of inertia of the plate about the axis CD is then equal to

19. Let  be the moment of inertia of an uniform square plate about an axis AB that passes through its centre and is parallel to two of its sides. CD is a line in the plane of the plate that passes through the centre of the plate and makes an angle θ  with AB . The moment of inertia of the plate about the axis CD is then equal to

(a)   l                     

(b)   l sin2θ                                  

(c)   l cos2θ                        

(d)  l   cos2θ/2                 

Ans. a      

(8)

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12. An ideal gas is taken through the cycle A→ B → C → A, as shown in the figure. If the net heat supplied to the gas in the cycle is 5 J, the work done by the gas in the process C → A is

(a)      – 5 J (b)  – 10 J (c)   – 15 J (d)  – 20 J Answer-a (126)

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