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Chapter 1 The Language Of Chemistry | Exercise 1B

Question 4

A microscope is provided with a main scale graduated with 20 divisions in 1cm and a vernier scale with 50 divisions on it of length same as of 49 divisions of main scale. Find the least count of the microscope.

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Given: 1 main scale division = 1/20cm

50 divisions of vernier scale = 49 divisions of main scale

1 division of vernier scale = 49 ÷ 50 main scale divisions

= 0.98 main scale division

Vernier calipers:

L.C = 1 main scale division – 1 vernier scale division

= 1 main scale division – 0.98 main scale division

= 0.02 main scale division

Microscope:

1 main scale division = 1/20cm

L.C = 0.02 x 1/20 = 0.001cm

∴ Least count of the microscope is 0.001cm

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Question 4

A microscope is provided with a main scale graduated with 20 divisions in 1cm and a vernier scale with 50 divisions on it of length same as of 49 divisions of main scale. Find the least count of the microscope.

Looking to do well in your science exam ? Learn from an expert tutor. Book a free class!

Given: 1 main scale division = 1/20cm

50 divisions of vernier scale = 49 divisions of main scale

1 division of vernier scale = 49 ÷ 50 main scale divisions

= 0.98 main scale division

Vernier calipers:

L.C = 1 main scale division – 1 vernier scale division

= 1 main scale division – 0.98 main scale division

= 0.02 main scale division

Microscope:

1 main scale division = 1/20cm

L.C = 0.02 x 1/20 = 0.001cm

∴ Least count of the microscope is 0.001cm

Our top 5% students will be awarded a special scholarship to Lido.

subject-cta
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