Practical Measurement Techniques and Improvements

The video tutorial discusses the practical exam, focusing on identifying limitations and suggesting improvements for experiments. It highlights common issues like insufficient readings and offers solutions such as taking more readings and plotting graphs. The tutorial also covers handling small physical quantities, accurate measurement techniques, and ensuring oscillation in one plane. Practical tips for reducing errors and improving experiment accuracy are provided, concluding with a reminder to like, comment, and subscribe.

What does Cambridge often ask for on the last page of the practical exam?

• A summary of the experiment

• Limitations and improvements

• A list of materials used

• Theoretical background

What is a common limitation mentioned in the practical exam?

• Not following instructions

• Taking only two readings

• Using outdated equipment

• Incorrect calculations

What improvement is suggested for the limitation of taking only two readings?

• Use a different experiment

• Take more readings and plot a graph

• Use a digital timer

• Increase the sample size

How can you reduce the effect of wind on an oscillation experiment?

• Conduct the experiment indoors

• Use a windshield

• Increase the mass of the object

• Perform the experiment at night

What tool can be used to improve measurement precision for small diameters?

• A ruler

• A micrometer

• A protractor

• A thermometer

What is a suggested method to deal with parallax error in measurements?

• Increase the distance from the scale

• Use a mirror scale

• Use a larger scale

• Use a digital scale

How can you ensure oscillation occurs in one plane?

• Trap the apparatus

• Use a different material

• Use a heavier object

• Increase the length of the string

What can be done to reduce friction at a pulley?

• Apply oil to lubricate the pulley

• Use a metal string

• Use a larger pulley

• Increase the tension in the string

What is a simple solution to reduce resistance at electrical contacts?

• Use thicker wires

• Use a different power source

• Increase the voltage

• Clean the contacts

What is a common issue when using a ruler to measure height?

• The ruler is not vertical

• The ruler is too flexible

• The ruler is too short

• The ruler is not calibrated