What are some sources of error in this physics lab?

In summary, the conversation discusses a lab that involves using a vacuum tube to determine an electron's charge to mass ratio. The link to the lab is provided and the speaker is seeking help in identifying sources of error for their error analysis. Potential sources of error mentioned include human error and error in measurement, and the speaker is asking for further explanations and ideas for related errors.
  • #1
Sheena
1
0
The lab called on us to use a vacuum tube to determine an electron's charge to mass ratio. Here is a link to the lab: http://www.clemson.edu/ces/phoenix/labs/cupol/eoverm/index.html. What are some sources of error in this lab?
I already know that human error and error in measurement can skew results, but I can't think of any other sources of error. I have to write a full error analysis and I don't have many ideas. Any explanations of errors would be appreciated. Thank you!
 
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  • #2
What measurements are you making? What physical elements are involved in the measurement? Surely you can think of some related errors.
 

What are some sources of random error in this physics lab?

Random errors are unpredictable and can occur due to various factors such as human error, equipment limitations, or environmental conditions. Some common sources of random error in a physics lab include measurements taken with imperfect instruments, fluctuations in temperature or humidity, and variations in experimental technique.

What is systematic error and how does it affect the results of a physics lab?

Systematic error is a consistent deviation from the true value that occurs in every measurement taken in an experiment. It can be caused by faulty equipment, incorrect calibration, or flawed experimental design. Systematic error can significantly affect the accuracy and precision of results, making it important to identify and correct for these errors in a physics lab.

How can human error impact the outcome of a physics lab?

Human error refers to mistakes made by the experimenter during the data collection or analysis process. This can include errors in reading instruments, recording data, or performing calculations. Human error can introduce significant uncertainties in the results of a physics lab, and it is important to minimize it by following proper experimental procedures and double-checking all measurements.

What is the difference between precision and accuracy in a physics lab?

Precision refers to the consistency and reproducibility of results, while accuracy refers to how close the measured values are to the true value. In a physics lab, random errors can affect precision, while systematic errors can affect accuracy. To improve both precision and accuracy, it is essential to identify and correct for sources of error in the experiment.

How can environmental factors impact the outcome of a physics lab?

Environmental factors such as temperature, humidity, and air pressure can have a significant impact on the results of a physics lab. For example, changes in temperature can cause instruments to expand or contract, affecting their accuracy. It is essential to control and monitor these environmental factors to reduce their influence on the experiment's outcome.

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