Assertion : For a system of particles under central force field,...

Assertion : For a system of particles under central force field, the total angular momentum is conserved. Reason : The torque acting on such a system is zero.

Options

AIf both assertion and reason are true and reason is the correct explanation of assertion.
BIf both assertion and reason are true but reason is not the correct explanation of assertion.
CIf assertion is true but reason is false.
DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion.

Step-by-step solution

When external torque acting on the system is zero then only the total angular momentum of system is considered to be conserved.

\vec{\tau}=\frac{d \vec{L}}{d t}

\vec{\tau}=0, \frac{d \vec{L}}{d t}=0 \Rightarrow \vec{L}=I \omega=

constant

Practice Rotational Motion on Quantrex Academy →

More from Rotational Motion

A solid sphere A of radius R and mass M is attached at a point to a smaller solid sphere… NEET 2026 The angular speed of a flywheel is increased from 600 rpm to 1200 rpm in 10 s. The number… NEET 2026 A thin wire of length ' L ' and linear mass density ' m ' is bent into a circular ring… NEET 2026 A thin horizontal disc is rotating about a vertical axis passing through its fixed centre… NEET 2026 The Sun rotates around its centre once in 27 days. What will be the period of revolution… NEET 2025 A sphere of radius R is cut from a larger solid sphere of radius 2 R as shown in the… NEET 2025 The radius of gyration of a solid sphere of mass 5 kg about X Y is 5 m as shown in… NEET 2024 A wheel of a bullock cart is rolling on a level road as shown in the figure below. If its… NEET 2024 Full Rotational Motion list All AIIMS PYQs