11th Physics Material Tamil Medium. We covered all the 11th Physics Material Tamil Medium in this post for free so that you can practice well for the exam.
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11th Physics Quiz for Students
The rotational kinetic energy and translational kinetic energy of the rolling body are equal. The body is :
(A) A sphere
(B) A disc
(C) A thin ring
(D) A rod
Option c - A thin ring
An automobile engine develops (60x3.14) kW of power when it is rotating at a speed of 1800 rev/min. The torque it can transfer to the wheel is :
(A) 10³ Nm
(B) 60x3.14 Nm
(C) 1800 Nm
(D) 1.8x10³ Nm
Option a - 10³ Nm
A ballet dancer spins about a vertical axis at 180 rpm with her arms outstretched. When she folds her arms moment of inertia about the same axis decreases by 40%. Her new rpm speed will be :
(A) Same as before
(B) 120 rpm
(C) 240 rpm
(D) 300 rpm
Option d - 300 rpm
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