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:
(2N−1)/2N
(2N−1)/20N
(2N−1)
(2N−1)/2
Q2. 20 VSD = 19 MSD, LC = 0.1 mm. One MSD equals:
5 mm
2 mm
1 mm
0.5 mm
Q3. If v = At² + Bt/(C+t), dimension of ABC is:
[M⁰L¹T⁻²]
[M⁰L²T⁻³]
[M⁰L²T⁻²]
[M⁰LT⁻¹]
Q4. Time error = +2%, mass error = −1%. % error in spring constant:
5%
3%
1%
4%
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:
7%
8%
5%
4%
Q8. Least count of travelling microscope is:
0.002 cm
0.0025 cm
0.0005 cm
0.001 cm
Q9. Dimensional formula of a/b in van der Waals equation is:
[M⁶L⁷T⁴]
[M⁻¹L⁵T³]
[M⁰L³T⁻²]
[ML²T⁻²]
Q10. Vernier constant of travelling microscope is:
0.01 mm
0.01 cm
0.1 mm
0.1 cm
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