PRACTICAL SKILLS ASSESSED IN THE PRACTICAL ENDORSEMENT

 

 Module 1: Development of practical skills in physics

1.2 Practical skills assessed in the practical endorsement 

1.2.1

Practical Skills

Independent thinking

a)      Apply investigative approaches and methods to practical work

Use and application of scientific methods and practices

b)      Safely and correctly use a range of practical equipment and materials

c)      Follow written instructions

d)     Make and record observations/measurements

e)      Keep appropriate records of experimental activities

f)       Present information and data in a scientific way

g)      Use appropriate software and tools to process data, carry out research and report findings

Research and referencing

h)     Use online and offline research skills including websites, textbooks and other printed scientific sources of information

i)        Correctly cite sources of information

Instruments and equipment

j)       Use a wide range of experimental and practical instruments, equipment and techniques appropriate to the knowledge and understanding included in the specification.
1.1.2

Use of apparatus and techniques

a)      Use of appropriate analogue apparatus to record a range of measurements (to include length/ distance, temperature, pressure, force, angles and volume) and to interpolate between scale markings

b)     Use of appropriate digital instruments, including electrical multimeters, to obtain a range of measurements (to include time, current, voltage, resistance and mass)

c)      Use of methods to increase accuracy of measurements, such as timing over multiple oscillations, or use of fiducial marker, set square or plumb line

d)     Use of a stopwatch or light gates for timing

e)      Use of calipers and micrometers for small distances, using digital or vernier scales

f)       Correctly constructing circuits from circuit diagrams using DC power supplies, cells, and a range of circuit components, including those where polarity is important

g)      Designing, constructing and checking circuits using DC power supplies, cells, and a range of circuit components

h)     Use of a signal generator and oscilloscope, including volts/division and time-base

i)        Generating and measuring waves, using microphone and loudspeaker, or ripple tank, or vibration transducer, or microwave/radio wave source

j)       Use of a laser or light source to investigate characteristics of light, including interference and diffraction

k)     Use of ICT such as computer modelling, or data logger with a variety of sensors to collect data, or use of software to process data

l)        Use of ionizing radiation, including detectors.

 

  • 1 Practical skill:

  • a) Apply Investigative Approaches and Methods to Practical Work (Scientific Methods and Practices)

  • ⇒ Define the Problem:
  • Identify the aim of the experiment.
  • Example: Investigating the relationship between force and acceleration to verify Newton’s Second Law.
  • ⇒ Hypothesis and Predictions:
  • Use prior knowledge to predict outcomes.
  • Example: Predicting that force and acceleration are directly proportional.
  • ⇒ Experimental Design:
  • Determine the independent variable (e.g., applied force), dependent variable (e.g., acceleration), and control variables (e.g., mass of the object).
  • Plan the experiment to minimize uncertainties and errors.
  • ⇒ Iterative Approach:
  • Refine methods if data doesn’t align with theoretical predictions.
  • Example: Adjusting the setup of an air track to reduce friction for accurate motion analysis.

  • b) Safely and Correctly Use a Range of Practical Equipment and Materials

  • ⇒ Handling Equipment Safely:
  • Electric Circuits: Ensure power supplies are turned off before connecting components.
  • Figure 1 Handing equipment safely for electric circuits
  • Lasers: Avoid direct exposure to the eyes by using safety goggles and placing warning signs.
  • Figure 2 Laser equipment safety
  • ⇒ Common Apparatus in Physics Labs:
  • Multimeters: Correctly measure voltage, current, or resistance.
  • Figure 3 Multimeter for measuring voltage, current, and resistance
  • Oscilloscopes: Safely set up to visualize AC waveforms and measure frequency or amplitude.
  • Figure 4 Oscilloscopes
  • Vernier Calipers & Micrometers: Handle with care to measure small dimensions precisely.
  • Figure 5 Vernier calipers and micrometers
  • ⇒ Material Safety:
  • Be cautious with materials like mercury (used in some thermometers) or radioactive sources, following strict lab protocols.

  • c) Follow Written Instructions

  • ⇒ Understand the Procedure:
  • Carefully read lab manuals and experimental guidelines.
  • Example: Following the exact steps for determining the Young’s modulus of a wire.
  • Figure 6 Determining the Young’s modulus of a wire
  • ⇒ Interpretation of Diagrams:
  • Understand circuit diagrams, equipment setups, and graphs provided in instructions.
  • ⇒ Adherence to Precision:
  • Follow calibration procedures for instruments like balances or spectrometers.

  • d) Make and Record Observations/Measurements

  • ⇒ Taking Accurate Measurements:
  • Use appropriate instruments (e.g., light gates for time measurements, motion sensors for displacement).
  • Record readings to the correct number of significant figures.
  • ⇒ Qualitative Observations:
  • Note phenomena like interference patterns (Young’s Double-Slit Experiment) or standing waves in a string.
  • ⇒ Quantitative Data:
  • Example: Measure the time period of a pendulum using a stopwatch, and repeat for multiple trials to calculate an average.

  • e) Keep Appropriate Records of Experimental Activities

  • ⇒ Structured Lab Notebook:
  • Include experiment title, date, objective, method, results, and analysis.
  • Example: A record of distances, times, and velocities while studying projectile motion.
  • ⇒ Raw Data Preservation:
  • Maintain unaltered raw data tables alongside processed data.
  • ⇒ Annotations:
  • Note environmental factors like temperature or air resistance that might influence results.

  • f) Present Information and Data in a Scientific Way:

  • ⇒ Data Tables:
  • Organize data into rows and columns with headings specifying quantities and units (e.g., time in seconds, distance in meters).
  • ⇒ Graphs:
  • Plot graphs with appropriate axes and scales.
  • Example: Plotting a graph of extension versus force to determine the spring constant.
  • ⇒ Units and Significant Figures:
  • Ensure consistency in units (e.g., SI units) and significant figures in results and calculations.
  • ⇒ Reports:
  • Present results in a structured format
  • Introduction
  • – Methodology
  • – Results
  • – Analysis and Conclusion
  • – Error Discussion

  • g) Use Appropriate Software and Tools to Process Data, Carry Out Research, and Report Findings

  • ⇒ Data Analysis Tools:
  • Use software like Excel or Python for:
  • – Calculating averages, standard deviations, or percentages.
  • – Fitting trendlines to graphs (e.g., linear, exponential fits).
  • ⇒ Graphing Software:
  • Use Origin, MATLAB, or LoggerPro for high-quality graph plotting and analysis.
  • Figure 7 Graphically software for analysis the data (Origin)
  • ⇒ Simulations:
  • Employ simulation software (e.g., PhET, Algodoo) to visualize concepts like electric fields or projectile motion.
  • ⇒ Online Research:
  • Access databases for background research (e.g., arXiv, PubMed) to contextualize experimental findings.
  • ⇒ Report Writing:
  • Use word processors like Microsoft Word for reports, integrating data plots, and LaTeX for scientific typesetting.

  • h) Use Online and Offline Research Skills

  • 1. Online Research Skills:
  • ⇒ Finding Reliable Sources:
  • Use trusted scientific databases (e.g., arXiv, ScienceDirect, Google Scholar, PubMed) for peer-reviewed papers.
  • Governmental or educational websites (e.g., NASA, CERN, MIT OpenCourseWare) provide validated physics content.
  • Physics-specific forums and educational platforms like Khan Academy or HyperPhysics offer accessible explanations of complex concepts.
  • ⇒ Search Strategies:
  • Use specific keywords, Boolean operators (AND, OR, NOT), and filters for narrowing down searches.
  • Example: Searching for “application of quantum mechanics in semiconductors” could be refined as “quantum mechanics” AND “semiconductors” AND “applications”.
  • ⇒ Critical Evaluation:
  • Verify the credibility of websites by checking for:
  • – Authors’ credentials.
  • – Publication dates (to ensure updated information).
  • – Citations supporting claims.
  • 2. Offline Research Skills:
  • ⇒ Textbooks and Journals:
  • Use standard physics textbooks like University Physics by Sears and Zemansky or Concepts of Physics by H.C. Verma for foundational concepts.
  • Refer to journals like The American Journal of Physics for advanced research.
  • ⇒ Library Resources:
  • Utilize physical libraries or e-libraries for access to physics encyclopedias, handbooks, and lab manuals.
  • ⇒ Cross-Referencing:
  • Combine multiple offline and online resources to ensure consistency in information.

  • i) Correctly Cite Sources of Information

  • ⇒ Why Citation is Important:
  • Gives credit to original authors.
  • – Allows verification of information.
  • – Prevents plagiarism.
  • ⇒ Citation Formats:
  • ⇒ APA Style (Common in Physics):
  • Books:
  • – Halliday, D., Resnick, R., & Walker, J. (2010). Fundamentals of Physics (9th ed.). Wiley.
  • Articles:
  • – Author(s). (Year). Title. Journal Name, Volume(Issue), Page Numbers. DOI/Publisher.
  • Websites:
  • – Author/Organization. (Year). Title. Retrieved from URL.
  • ⇒ IEEE Style (For technical fields):
  • Use numbered references:
  • – [1] D. Halliday, R. Resnick, and J. Walker, Fundamentals of Physics, 9th ed., Wiley, 2010.
  • ⇒ Tools for Managing References:
  • Use citation software like Zotero, EndNote, or Mendeley to automate reference creation.
  • Example: If citing a research paper on quantum mechanics, input the DOI into the software to generate a formatted citation.
  • ⇒ Instruments and Equipment in Physics

  • j) Use a Wide Range of Experimental and Practical Instruments, Equipment, and Techniques

  • Table 1 Essential Physics Instruments and Their Usage
Instrument/Equipment Application Key techniques
Stopwatch Measuring time intervals Start/stop precisely to reduce reaction time error.
Vernier caliper/ Micrometer Measuring small dimensions Zero error correction before measurement.
Spring balance Measuring forces Calibrate the device for accurate readings
Multimeter Measuring voltage, Current, and resistance Set to correct mode avoid overload
Oscilloscope Measuring waveforms and frequencies Adjust time base and voltage gain for clear waveforms.
Laser and Diffraction Grating Determining wavelength of light Align the laser properly: Calculate using the diffraction equation [math]n\lambda = d \sin\theta[/math].
Air Track Investigating motion with minimal friction Ensure track alignment and consistent air flow.
CRO (Cathode Ray Oscilloscope) Visualizing AC signals and frequencies Use calibrated scales to measure amplitude and time period.
Spectrometer Studying light spectra Accurately align the telescope and collimator for readings.
  • ⇒ Advanced Instruments in Physics Labs:
  • Particle Detectors:
  • – Used in particle physics (e.g., cloud chambers, scintillation counters).
  • – Technique: Calibrate detectors and minimize noise.
  • High-Precision Balances:
  • – For accurate mass measurements.
  • – Zero the balance before use and ensure it’s on a stable surface.
  • Electron Microscopes:
  • – For atomic-scale imaging.
  • – Operate under vacuum conditions with careful sample preparation.
  • ⇒ Experimental Techniques:
  • Calibration of Instruments:
  • – Example: Zero the Vernier caliper or micrometer before use.
  • Error Minimization:
  • – Perform experiments multiple times to calculate an average value.
  • – Identify systematic errors and account for them (e.g., parallax error in measurements).
  • Graphical Analysis:
  • – Example: Use graphs to find acceleration from a velocity-time graph.
  • Data Handling:
  • – Maintain precision by recording all measurements with correct significant figures.
  • To master research and referencing in physics:
  • – Use reliable online/offline sources and properly cite information.
  • – For instruments and techniques:
  • – Gain proficiency with fundamental tools like stopwatches, multimeters, and spectrometers.
  • – Practice advanced techniques like graphical data analysis, error handling, and calibration. By integrating these skills, physics experiments become accurate, reliable, and scientifically robust.
For video lectures subscribe to our YouTube channel
Request a lesson
error: Content is protected !!