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Units, Dimensions and Measurement — JEE physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 ScienceJEE physicsUnits, Dimensions and Measurement1 Mark
MCQ
The dimensions of inter atomic force constant are
  • ✓
    $M T^{-2}$
  • B
    $M L T^{-1}$
  • C
    $M L T^{-2}$
  • D
    $M L^{-1} T^{-1}$
✓

Answer

Correct option: A.
$M T^{-2}$
(a)
$K=Y \times r_0=\left[M L^{-1} T^{-2}\right] \times[L]=\left[M T^{-2}\right]$.
$Y=\text { Young's modulus and } r_0=\text { Interatomic distance }$

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