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A particle moves on a circular path of radius R, so that its angular velocity about a fixed point on the circumference of the circular path is constant and is equal to $ω$ . Then

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acceleration of the particle will be zero.

the acceleration of the particle is constant in magnitude and is equal to $4 R ω^{2}$

the acceleration of the particle is variable.

the acceleration of the particle varies in magnitude only

answer is A, B.

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It is uniform circular motion with angular speed $= 2 ω$ about centre.
Acceleration is variable in direction, but constant in magnitude $= 4 ω^{2} R$
Ans. AB

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