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The ratio of the dimension of Planck's constant and that of the moment of inertia is the dimension of:

1. time
2. frequency
3. angular momentum
4. velocity

Correct answer: frequency

Solution

Planck's constant (h) has dimensions of energy × time ([ML²T⁻¹]), and moment of inertia (I) has dimensions of mass × length² ([ML²]). Dividing h by I gives dimensions of [T⁻¹], which corresponds to frequency.

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