JEE Main 2025 Physics question

A circular disk of radius R meter and mass M kg is rotating around the axis perpendicular to the disk. An external torque is applied to the disk such that , where is the angular position of the rotating disc as a function of time t. How much power is delivered by the applied torque, when t = 2s?

• (1)60 MR²Correct
• (2)72 MR²
• (3)108 MR²
• (4)8 MR²