NEET Physics (general) MCQ Question
Which of the following statements about units and measurements is correct?
The SI unit of luminous intensity is the candela, which is defined based on the luminous efficacy of radiation.
1 Å is equivalent to 1 x 10^-9 m, which is used to measure atomic scale lengths.
The dimension of energy is given as [M L^2 T^-2], which is derived from the equation for kinetic energy.
One mole of hydrogen atoms occupies a volume of 1 m^3 at standard temperature and pressure.
Correct Answer
Detailed Explanation
The candela is indeed the SI unit of luminous intensity, defined in relation to specific radiation characteristics. Option B misstates the value of an angstrom, and D incorrectly states the volume occupied by a mole of hydrogen, which is 22.4 L, not 1 m^3.
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