Home MCQs NEET Physics Question #7220
Back to Questions
NEET Physics QUESTION #7220
Question 1

Which of the following pairs does not have similar (same) dimensions?

  • Tension and surface tension✔️
  • Stress and pressure
  • Planck's constant and angular momentum
  • Angle and strain
Correct Answer Explanation

Checking each pair:

  • Tension: $[MLT^{-2}]$ (force). Surface tension: $[MT^{-2}]$ (force per length). These are different — this pair does NOT have the same dimensions.
  • Stress and Pressure: both $= [ML^{-1}T^{-2}]$ — same dimensions.
  • Planck's constant $[h] = [ML^2T^{-1}]$. Angular momentum $[L] = [ML^2T^{-1}]$ — same dimensions.
  • Angle and Strain: both are dimensionless ratios — same dimensions.

Tension $[MLT^{-2}]$ vs Surface tension $[MT^{-2}]$ — these differ by $[L]$, so this pair does NOT have similar dimensions.