Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202524 JanuaryMorning Shift
Exam
JEE Main
Year
2025
Date
24 January
Shift
Morning Shift
Subject
Physics
Chapter
Experimental Physics

JEE Main 2025 · 24 January · Morning Shift · Physics · Experimental Physics

The least count of a screw guage is 0.01 mm . If the pitch is...

The least count of a screw guage is 0.01 mm . If the pitch is increased by 75%75 \% and number of divisions on the circular scale is reduced by 50%50 \%, the new least count will be _____ ×10−3 mm\times 10^{-3} \mathrm{~mm}

Correct answer

0

Step-by-step solution

 Given least count of  Screw Gauge =0.01mm L.C =( pitch ) No. of circular turn =PN=0.01mm New pitch =P(1+0.75)N(1−0.5)=PN[1.750.5]=(0.01)3.5=0.035mm=35×10−3mm\begin{aligned} & \text{ Given least count\text{ of } Screw Gauge }=0.01 \mathrm{ mm} \\ & \text{ L.C }=\frac{(\text{ pitch })}{\text{ No. of circular turn }}=\frac{\mathrm{P}}{\mathrm{N}}=0.01 \mathrm{ mm} \\ & \text{ New pitch }=\frac{\mathrm{P}(1+0.75)}{\mathrm{N}(1-0.5)}=\frac{\mathrm{P}}{\mathrm{N}}\left[\frac{1.75}{0.5}\right] \\ & =(0.01) 3.5 \\ & =0.035 \mathrm{ mm} \\ & =35 \times 10^{-3} \mathrm{ mm}\end{aligned}
Practice Experimental Physics on Quantrex Academy →

More from Experimental Physics

Two thin wires, Wire-1 of diameter 0.650 mm and Wire-2 of unknown diameter d are given.… JEE Advanced 2026In a Vernier calipers, when both jaws touch each other, zero of the Vernier scale is… JEE Main 2026In a screw gauge when the circular scale is given five complete rotations it moves… JEE Main 2026In a screw gauge the zero of main scale reference line coincides with the fifth division… JEE Main 2026In an experiment, a set of reading are obtained as follows - 1.24 ~mm, 1.25 ~mm, 1.23 ~mm… JEE Main 2026When both jaws of vernier callipers touch each other, zero mark of the vernier scale is… JEE Main 2026In a vernier callipers, 50 vernier scale divisions are equal to 48 main scale divisions.… JEE Main 2026In a screw gauge, the zero of the circular scale lies 3 divisions above the horizontal… JEE Main 2026 Full Experimental Physics list All JEE Main PYQs