Measurement

Disparity between the measured value and the “true value” of the object being measured.

• Measurement

• Error

• Uncertainties

Associated with instruments used to obtain measurements and can be classified: observational, environmental, and instrumental.

• random error

• gross error

• systematic error

A kind of errors in measurement that is incorrect setting of the instrument being used, carelessness, and bias of the operator when making observations.

• observational error

• environmental error

• instrumental error

This error of measurement is primarily caused by temperature, moisture, dirt, and vibrations.

• observational error

• environmental error

• instrumental error

Regular maintenance of instruments should always be done so that we can avoid errors in measurement.

• True

• False

Which of the following is an example of a random error in measurement?

• varying position of the experimenter when taking measurements

• distorted lines on a graduated cylinder

• the uneven surface where a platform balance is placed

• a sudden influx of voltage supply in voltmeter

How many sig fig are in 12034?

• 1

• 2

• 3

• 4

• 5

How many sig fig are in 10.5

• 1

• 2

• 3

Which of the following measurements has three significant figures?

• 0.03 m

• 3.00 m

• 300 m

• 0.30 m

How will you round off 658.34 kg to three significant figures?

• 658.00 kg

• 660 kg

• 658 kg

• 650 kg