Physics Measurement

How CLOSE a measurement or attempt is to the actual value is the definition of ..............

• systematic

• precision

• accuracy

• sensitivity

How CONSISTENT our results are regardless of proximity to the actual value is the definition of .......

• accuracy

• target value

• uncertainty

• precision

Which of the following shows an accurate but not precise data

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Which of the following shows a precise but not accurate data?

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Which of the following equation represent error in measurement?

• Error = Measured Value - True Value

• Error = 1 - True Value

• Error = True Value + Measured Value

• Error = 1 - Measured Value

The imperfection in experimental technique or procedure is an example of .....

• Environmental error

• Parallax error

• Random error

• Systematic error

The micrometer screw gauge shows a reading of ....

• 3.31 cm

• 3.81 cm

• 3.31 mm

• 3.81 mm

The vernier calliper shows the reading of....

• 3.5 mm

• 3.6 mm

• 3.1 mm

• 4.6 mm

Parallax error is due to:

• the instrument does not read exactly zero when there is nothing being measured

• incorrect positioning of the eye

• object not being at the same level as the marking on the scale

• the experimenter consistently underestimate or overestimate a reading

Which of the following is NOT associated to micrometer screw gauge

• two scales: main scale and circular scale

• one complete turn moves the spindle by 0.1 mm

• each division on the circular scale = 0.01 mm

• modern micrometers have a ratchet