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WorksheetsError Analysis & Significant figures
Total questions: 42
Worksheet time: 42mins
Distance from Sharjah to dubai is 20+ 2 km and from Dubai to Abu Dhabi is 105 + 3km. What is the total distance between Sharjah and Abu Dhabi? Express the answer with systematic error in the measurement.
125 + 5 km
85 + 1 km
125 + 1 km
85+ 5 km
Temperature of water falls from 60+1 Degree to 25+1 degree. What is the fall in temperature? Express the answer with systematic error in the measurement.
35+1
35+ 2
85 + 1
85+ 2
Length and width of a table is 120+5 cm and 70 + 5 cm respectively. What is the perimeter of the table?
190 + 20 cm
380 + 10 cm
190 + 10 cm
380 + 20 cm
Length and width of a table is 120+5 cm and 70 + 5 cm respectively. What is the percentage error in the perimeter of the table?
10.5%
2.6%
5.3%
2.0%
Which of these is NOT true for systematic errors?
They arise due to errors in the measuring instruments used.
Repeating the observations or increasing the sample size can eliminate them
They are reproducible inaccuracies that are consistently in the same direction.
They arise from the design of the study.
Which of these is NOT true for random errors?
They are difficult to detect.
They do not arise from the design of the study.
They are less likely for small sample sizes.
Systematic errors lead to a lack of:
accuracy in the measurement.
significant digits in the measurement.
precision in the measurement.
gradation of the measuring instrument
Random errors lead to a lack of:
accuracy in the measurement.
significant digits in the measurement.
precision in the measurement.
gradation of the measuring instrument
Repeated measurements of a quantity can reduce the effects of
both random errors and systematic errors
neither random errors nor random errors
random errors
systematic errors
How close a measurement is to the true value is called..
Accuracy
Precision
Significant
Estimate
This bullseye demonstrates...
High Accuracy & High Precision
High Accuracy & Low Precision
Low Accuracy & High Precision
Low Accuracy & Low Precision
Two students A and B measured the diameter of a wire in mm.
Data A: 1.57, 1.58, 1.43, 1.50, 1.42 Average of data A: 1.50
Data B: 1.60, 1.59, 1.59, 1.60, 1.62 Average of data B: 1.60
Actual diameter is known to be 1.50 mm.
Whose data is more precise?
A, because the values in his data are close to each other
B, because the values in his data are close to each other
A, because the average value is close to the actual value
B, because the average value is close to the actual value
Which of the following is NOT an example of random error?
Measuring wind velocity depends on the height and time at which a measurement is taken. Multiple readings must be taken and averaged because gusts and changes in direction affect the value.
Readings must be estimated when they fall between marks on a scale or when the thickness of a measurement marking is taken into account.
When taking a volume reading in a flask, you may read the value from a different angle each time.
Measuring length with a metal ruler will give a different result at a cold temperature than at a hot temperature, due to thermal expansion of the material.
How close a measurement is to the true value is called..
Accuracy
Precision
Significant
Estimate
The students measured length during a science experiment, they got 12 cm. But the actual measurement was 14.25 cm. What was the percent error?
15.79%
18.75%
2.25%
18%
The formula for wave speed is wavelength x frequency. As long as the wave speed stays the same, If wavelength increases, frequency decreases. We say that wavelength and frequency have a(n) ___ ___
Linear relationship
Inverse relationship
Quadratic relationship
According to Newton's Second Law of Motion, if you increase the mass of an object, the force required to accelerate it increases at the same rate. We say that force and mass have a(n) ___ ___
Linear relationship
Inverse relationship
Quadratic relationship
Temperature of water falls from 60+1 Degree to 25+1 degree. What is the percentage error in fall in temperature?
5.7%
2.9%
2.4%
1.2%
Accuracy of a measurement depends on
Resolution of the instruments
Skill of the measuring person
Environmental conditions
Care with which the measurements are done
All of the above
Magnitude of difference between individual and true value of the quantity
Gross error
Percentage error
Relative error
Absolute error
Percentage error is
Relative error / 1oo
Relative error x 1oo
Absolute error x100
Absolute error / 100
Number of significant figures in 4.0200 is
5
4
3
2
Number of significant figures in 0.009407 is
7
6
4
3
Number obtained after rounding 6.7835 to 3 decimal points is
6.783
6.784
3.536+ 2.16 =
5.606
5.69
5.70
5.696
2.6938 m x 6.79 m =
18.290902 m2
18.291 m2
18.29 m2
18.3 m2
What is the name of the process that is the comparison between a standard and a physical quantity to produce numeric value.
Measurement
SI Unit
Sensing
Inquiry
What type of error is shown in the picture above?
Systematic
Random
What kind of the error arise when improper reading of the instrument due to the improper position of the person's head or eye?
Systematic
Random
The errors that result in obtaining different measured values when repeated measures of a physical quantity are taken are called:
Systematic
Random
Which type of the error can be avoided and corrected?
Systematic
Random
