Measurements

Question 1

How to reduce random error?

Answer 1

It can be reduced by taking a large number of independent readings of a quantity and taking the average

Question 2

How to eliminate zero error?

Answer 2

Correct the zero error by simple addition or subtraction of this error for subsequent errors.

Question 3

What is systematic error?

Answer 3

Systematic error is one that occurs according to some fixed rule or pattern such that they yield a consistent over estimation or under estimation of a true value of a measured quantity.

Question 4

What is random error?

Answer 4

Random error is one that occurs without a fixed pattern such that a set of measurements done under the same conditions have an equal likely chance of being greater or less than the true value.

Question 5

Definition of uncertainty

Answer 5

Uncertainty is an estimate of systematic and/or random errors inherent in the measurement or calculation.

Question 6

When values are plotted on a graph, what kind of error does it reduce?

Answer 6

Random error

note: values are plotted on a graph and need to draw best fit line

Question 7

What is the definition of a reading?

Answer 7

Reading is a single determination of value of unknown quantity.