Question Detail

PHY 101 Physical Quantities, Units, and Dimensions Objective Question
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Question

If the zero mark on the vernier scale of a caliper is to the right of the zero mark on the main scale when the jaws are closed, the instrument has
Options
A a negative zero error, and the zero correction must be subtracted.
B a negative zero error, and the zero correction must be added.
C a positive zero error, and the zero correction must be subtracted.
Correct Answer
D a positive zero error, and the zero correction must be added.
Correct Answer

Option C is the correct answer.

Detailed Explanation

If the vernier zero is to the right of the main scale zero when closed, the error is positive. To correct for this, the positive error reading must be subtracted from any measurement taken to get the true value.

Hint

Visualize the scales. If the zero mark is shifted to the right, it means the reading will be larger than the true value, so you need to subtract the error.

Question Info

Course: PHY 101
Topic: Physical Quantities, Units, and Dimensions
Type: Objective
Difficulty: Not specified
Question 688 of 1250
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