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NEET Physics
QUESTION #7220
Question 1
Which of the following pairs does not have similar (same) dimensions?
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.
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