A vernier has a negative zero error. When the jaws $J_{1}$ and $J_{2}$ are brought in contact the zero of the vernier must:

coincide with the zero of the mein scale

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be to the right of the zero of the main scale

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be to the left of the zero of the main scale

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none of the above

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Solution

The correct option is C be to the left of the zero of the main scale
The positive zero error occurs when the jaws are brought in contact the zero of the vernier must be right to the zero of main scale and negative zero error occurs when the jaws are brought in contact the zero of the vernier must be left to the zero of main scale.

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A vernier has a negative zero error. When the jaws J1 and J2 are brought in contact the zero of the vernier must:

A vernier has a negative zero error. When the jaws $J_{1}$ and $J_{2}$ are brought in contact the zero of the vernier must: