Q. What are the basics you should include when describing your method?
- How the independent variable is varied.
- How to measure both variables.
- How to keep control variables constant.
- Arrangement of apparatus in a clear, labelled diagram.
- A description of the procedure.
Q. What level of detail should you include in your procedure?
A method should include as much detail as possible, including repeats and second control variables that must be kept constant.
Q. What is an oscilloscope?
An instrument that displays a signal's waveforms on a graphical display. The y-axis typically shows the voltage, and the x-axis shows time.
Q. If the time base is switched off, what will the oscilloscope trace look like for an AC supply?
It will produce a straight vertical line on the oscilloscope screen.
Q. How can you increase the number of complete wavelengths that are visible on the oscilloscope screen?
The time base can be adjusted so that the increments are larger. This will result in more wavelengths being shown.
Q. What should you adjust if the maximum voltage isn't visible on the oscilloscope screen?
The volts per division can be increased so that each increment represents a larger voltage.
Q. What is the amplitude of a waveform?
The amplitude of a waveform is the maximum displacement from the equilibrium position of a wave.
Q. What is a light gate?
A light gate is a detector consisting of an infrared transmitter and receiver. The receiver gives information on whether or not the infrared beam is obstructed.
Q. What do you have to use sensors with to collect data?
A data logger.
Q. When stating safety considerations, what should you include?
A risk and a precaution for that risk.
Q. What is the meaning of risk?
A risk is any dangerous situation.
Q. What is the meaning of precaution?
A precaution is a step taken beforehand to reduce the chance of a risk happening.
Q. What safety precautions should be taken when using a Bunsen burner?
- Place on a heatproof mat.
- Clip back any loose hair or clothing.
- Have the safety flame on when not in use.
- If the flame goes out, turn off the gas immediately.
- Avoid touching during and immediately after use.
Q. What safety precautions should be taken when working with circuits?
- Turn off the power supply when setting up the circuit or making any component changes.
- Avoid touching components during or immediately after use.
- Ensure all wires are properly insulated.
Q. What safety precautions should be taken when using hanging masses?
- Don't stand directly below where the masses are hanging in case they fall.
- Place a padded bucket below the masses.
- Wear appropriate footwear.
Q. What safety precautions should be taken when using springs?
- Wear safety glasses in case the spring snaps or comes loose.
- Don't overload the spring. Once it begins to deform plastically, stop increasing the load.
Q. What safety precautions should be taken when working with hot water?
- Take care when pouring to prevent splashes and scalds.
- Ensure water doesn't end up near electrical equipment.
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