List of top Questions asked in KCET- 2015

The efficiency of a Carnot engine which operates between the two temperature $T_1 = 500\, K$ and $T_2 = 300\, K$ is

Moment of Inertia of a thin uniform rod rotating about the perpendicular axis passing through its centre is $I$. If the same rod is bent into a ring and its moment of inertia about its diameter is $I'$, then the ratio ${\frac {I}{I'}}$ is