JEE PHYSICS MCQ: UNITS & MEASUREMENTS

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Analyzing +4 | -1

The dimensions of

\frac{1}{{{ \in _0}}}\frac{{{e^2}}}{{hc}}

are

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Correct option: C

{M^0}{L^0}{T^0}{A^0}

Option C is correct. The expression is dimensionless because it represents the fine-structure constant, a fundamental constant in physics.

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