Q What does the line 'coincides with 25th division of main scale' mean can u please help me - Physics - Physical World

Question

Q What does the line 'coincides with 25th division of main scale'
mean? can u please help me with diagram?
The main scale reading of a screw gauge is 8 mm and the circular
scale coincides with 25 t h division of the main scale If the pitch
of the screw gauge is 0 5 mm and the number of circular scale
division is 100, then the observed reading will be

Vipra Mishra · Accepted Answer

Dear Student

It means line of circular scale coincides with 25th division of
main scale
This will give of value of circular scale for observed reading

Please below image here circualr scale coincides with 28th division
of main scale
<img alt="" src=
"https://s3mn%20mnimgs%20com/img/shared/content_ck_images/ck_5b01ac065d5f0%20png"
style="width: 725px; height: 378px;">

Regards