CameraIcon

SearchIcon

MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Measuring Length

A spherometer...

Question

A spherometer has 10 threads per cm and its circular scale has 50 divisions. The least count of the instrument is

A

0.01 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

0.02 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

0.002 c m

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

0.2 c m

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $0.002 c m$
The least count of the spherometer, $L C =$ pitch/ total number of circular divisions $= \frac{p}{n}$
Here, pitch $p = 1 / 20 = 0.1 c m$ and $n = 50$
Thus, $L C = \frac{0.1}{50} = 0.002 c m$

Suggest Corrections

thumbs-up

0

Similar questions

Q. A student measure the height h of a convex mirror using spherometer. The legs of the spherometer are 4 cm apart and there are 10 divisions per cm on its linear scale and circular scale has 50 divisions. The student takes 2 as linear scale division and 40 as circular scale division. What is the radius of curvature of the convex mirror ?

Q. Case 1: A spherometer has a least count of

0.005 m m

and its head scale is divided into

200

equal divisions. Let the distance between consecutive threads on the spherometer screw be

d_{1}

mm.
Case 2: A vernier calipers has each division on its main scale to be

1 m m

. On vernier scale,

99 m m

is divided into

100

division. Let the vernier constant be

d_{2}

mm.
Case 3: The pitch of a screw gauge is

1 m m

100

divisions on its circular scale. When no article is placed in between its jaws, the zero of the circular scale coincides with the reference line. When a steel wire is placed between the jaws, two main scale division are clearly visible and

67

divisions on the circular scale are observed. Let the diameter of the wire be

d_{3}

mm.
The values of

d_{1}

d_{2}

d_{3}

Q. Vernier calipers has its main scale 10 cm equally divided into 250 parts. Its vernier scale is of 50 division and coincide with 15 mm of the main scale. The least count of the instrument is :

On the basis of details given about two measuring instruments, select the correct statement:

(i) Vernier callipers having main scale division = 0.05 cm and vernier scale division = $\frac{2.45}{50}$ cm

(ii) Screw gauge having pitch 0.5 mm and its circular scale has 50 divisions

Q. A vernier callipers has its main scale of

10 c m

equally divided into

200

equal parts. Its vernier scale of

25

divisions coincides with

12 m m

on the main scale. The least count of the instrument is -

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

PHYSICS

Watch in App

explore_more_icon

Explore more

Measuring Length

Standard IX Physics

Join BYJU'S Learning Program

CrossIcon