Which one of the following statements is not correct?

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Q: 31 (NDA-II/2015)

Which one of the following statements is not correct?

question_subject: 

Science

question_exam: 

NDA-II

stats: 

0,6,25,9,7,6,9

keywords: 

{'kelvin scale': [0, 0, 0, 1], 'wavelength': [0, 0, 3, 3], 'wavelength range': [0, 0, 1, 0], 'visible light radiation': [0, 0, 0, 1], 'absolute scale': [0, 0, 0, 1], 'temperature': [0, 1, 1, 7], 'gamma rays': [1, 0, 4, 0]}

The correct answer is option 3: "The capacity to do work is called power." This statement is not accurate because power is not the capacity to do work, but rather the rate at which work is done. Work is defined as the transfer of energy that results in an object being displaced or a force being exerted on an object. Power, on the other hand, is the rate at which work is done or energy is transferred. It is calculated by dividing the work done by the time taken to do the work.

Option 1: The Kelvin scale of temperature being called the Absolute scale is correct. The Kelvin scale is an absolute temperature scale where 0 Kelvin represents absolute zero, which is the temperature at which all molecular motion ceases.

Option 2: It is correct that visible light radiation has a wavelength range of 400—700 nm. The visible light spectrum consists of different colors, each with its characteristic wavelength, and the range of wavelengths for visible light falls within 400—700 nm.

Option 4: It is also correct that the wavelength of Gamma rays is less than that of X-rays. Gamma rays have the shortest wavelengths within the electromagnetic spectrum, whereas X-rays have slightly longer wavelengths.