Question

20. What is the zero error as shown in the figure below? A) -0.3 mm B) 0.3 mm C) -0.7mm D) 0.7 mm

Answer 1

Answer:

option(b)

Explanation:

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Answer 2

Answer:

0.3mm

Explanation:

Since, the zero of vernier scale is ahead of zero of main scale. So the error is positive zero error.

Least count of the 0.1

Since the 3rd division matches with the main scale division.

so

Zero error = n x least count =3x0.1 =0.3mm

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