The dimensions of angular acceleration are:

Explanation

Angular acceleration (α) is defined as the rate of change of angular velocity (ω) with respect to time (t). Therefore, α = Δω/Δt. The dimension of angular velocity is T-1, so when divided by time (T), the dimension of angular acceleration becomes T-2. This is why the correct answer is T-2.Option B (LT-2) is incorrect because it describes linear acceleration, which involves change in linear velocity rather than angular velocity. Option C (LT-1) is incorrect as it describes velocity, which is a linear measure, not angular. Option D (M1T-2) is incorrect since it is the dimension of force, not relevant to angular acceleration.