Introduction to Physics - Measurement 1 - Error Analysis

This exercise consist of 6 objective questions.

1.  Which of the following is not example of systematic error?

1. Consistently improper use of equipment
2. Zero error
3. An incorrect calibration of the measuring instrument
4. Parallax error

2.  Systematic error can be reduced by

1. conducting the experiment with care.
2. using a more expensive measuring instrument.
3. repeat the experiment by using different instruments.
4. proper calibration or calibrate the instrument frequently.

3.  What is zero error?

1. Error due to the measuring instrument does not start from exactly zero.
2. Error due to the incorrect calibration of the measuring instrument 
3. Error due to a fault in the measuring instrument
4. Error due to the improper position of the eye.

4.  Random error can be reduced by

1. finding the average value of the readings.
2. repeating the experiment with different manipulated variables.
3. repeating the experiment with different measuring instrument.
4. avoiding parallax error.

5.  Which of the following statements is true about parallax error?

1. Parallax error is a random error
2. Parallax error is due to the incorrect eye position when reading the scale.
3. Parallax error can be reduced by repeating the reading for a few times.
4. Parallax error can be positive or negative.

6.  Which of the following statements are correct about systematic error and random error?

1. Systematic errors are errors which tend to shift all measurements in a systematic way so that the readings are always differ from the true value by a fixed amount.
2. Systematic error can be reduced by repeating the measurement for a few times and then find the average value of the readings.
3. Random errors arise from unknown and unpredictable variations in condition.
4. Random error can be reduced by repeating the measurement for a few times and then find the average value of the readings.