Units and Measurements Quiz – JEE Main 2026 | NEET JEE Rankers

Units & Measurements – JEE Main 2026 Quiz

Very important questions for preparation

Q1. Least count of a vernier caliper is 1/(20N) cm. One MSD = 1 mm. Required relation is:

Q2. 20 VSD = 19 MSD, LC = 0.1 mm. One MSD equals:

Q3. If v = At² + Bt/(C+t), dimension of ABC is:

Q4. Time error = +2%, mass error = −1%. % error in spring constant:

Q5. For E = α³e⁻ᵝᵗ, maximum % error in energy at t = 5 s is:

✔ Correct Answer: 6

Q6. Maximum fractional error (x/100) in area using screw gauge, find x:

✔ Correct Answer: 3

Q7. Maximum percentage error in density of wire is:

Q8. Least count of travelling microscope is:

Q9. Dimensional formula of a/b in van der Waals equation is:

Q10. Vernier constant of travelling microscope is:

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