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Friday, 9 October

NEET UG 2017 · Physics · Question 19

NEET 2017 Physics, question 19

Question 19 of the NEET 2017 paper (code A) is a Physics question from Units and Measurements. Its idea, Dimensions of Universal Constants, was asked twice, in 2017 and 2021, across NEET 2017–2026. The CBSE official answer key gives option 1.

Updated 2026-10-08

Q19 · Physics

A physical quantity of the dimensions of length that can be formed out of c, G and e24πϵ0\frac{e^2}{4\pi\epsilon_0} is [c is velocity of light, G is universal constant of gravitation and e is charge] :

  1. 11c2[Ge24πϵ0]1/2\frac{1}{c^2}\left[G\frac{e^2}{4\pi\epsilon_0}\right]^{1/2}Official answer
  2. 2c2[Ge24πϵ0]1/2c^2\left[G\frac{e^2}{4\pi\epsilon_0}\right]^{1/2}
  3. 31c2[e2G 4πϵ0]1/2\frac{1}{c^2}\left[\frac{e^2}{G\,4\pi\epsilon_0}\right]^{1/2}
  4. 41cGe24πϵ0\frac{1}{c}G\frac{e^2}{4\pi\epsilon_0}

Official answer: option 1 · CBSE official answer key

Same idea

Dimensions of Universal Constants, in other papers

NEET asked this idea twice, in 2017 and 2021. The other question below.

  • 2021 Q19If E and G respectively denote energy and gravitational constant, then EG\frac{E}{G} has the dimensions of :One-line MCQ · Medium

Dimensions of Universal Constants: every question and how it was framed

The chapter

Units and Measurements in ten years of NEET

20 questions from 2017–2026, asked in 10 of 10 papers, about 1.9 a paper. Units and Dimensions alone had 20.

Chapter analysisStudy this chapter

Units and Measurements: questions per paper

0241’171’181’193’203’213’222’233’242’251’26