Student Login

Home›Chapters›Units, Dimensions and Measurement PYQs›Least Count, Vernier Callipers & Screw Gauge›Question 40

JEE Main 2021 (17 Mar, Shift 1) · Least Count, Vernier Callipers & Screw Gauge

Least Count, Vernier Callipers & Screw Gauge question from JEE Main 2021 (17 Mar, Shift 1)

Q40JEE Main 2021 · 17 MAR · SHIFT 1Medium

Least Count, Vernier Callipers & Screw Gauge

The vernier scale used for measurement has a positive zero error of 0.2 mm. If while taking a measurement it was noted that '0' on the vernier scale lies between 8.5 cm and 8.6 cm, vernier coincidence is 6, then the correct value of measurement is ___________ cm. (least count = 0.01 cm)

Show answer and solution

Answer: (b)

Observed reading $= 8.5 + 6\times 0.01 = 8.56$ cm
Positive zero error $= 0.2$ mm $= 0.02$ cm
Correct value $= 8.56 - 0.02 = 8.54$ cm, answer (b).

Report a mistake

More questions on Least Count, Vernier Callipers & Screw Gauge

One main scale division of a vernier callipers is 'a' cm and nth division of the vernier…JEE Main 2021 (16 Mar, Shift 1)
A screw gauge gives the following readings when used to measure the diameter of a wire…NEET 2021
In a Screw Gauge, fifth division of the circular scale coincides with the reference line…JEE Main 2021 (26 Aug, Shift 1)
Assertion A: If in five complete rotations of the circular scale, the distance travelled…JEE Main 2021 (27 Jul, Shift 1)
The pitch of the screw gauge is 1 mm and there are 100 divisions on the circular scale…JEE Main 2021 (25 Feb, Shift 1)
Student A and student B used two screw gauges of equal pitch and 100 equal circular…JEE Main 2021 (25 Jul, Shift 1)
The diameter of a spherical bob is measured using a vernier callipers. 9 divisions of the…JEE Main 2021 (31 Aug, Shift 2)
A screw gauge has least count of 0.01 mm and there are 50 divisions in its circular…NEET 2020 (Phase 1)