Practical 4

Practical 4

SLT 203 PHYSICAL LABORATORY TECHNIQUES

Akeem B. Agboola

Lesson Plan on SLT 203 from ChatGPT

SECTION A: NUC‑STYLE FORMAL LESSON PLAN

Institution: Obafemi Awolowo University, Ile-Ife
Faculty: Science
Department: Physics and Engineering Physics
Programme: B.Sc. Science Laboratory Technology
Course Title: Physical Laboratory Techniques
Course Code: SLT 203
Level: 200
Credit Load: 2 Units (1 Theory, 1 Practical)
Semester: Harmattan Semester
Contact Hours: 30 hours (Theory) + 30 hours (Practical)

Course Description

This course introduces undergraduate students to essential physical laboratory techniques with emphasis on laboratory safety, measurement methods, error analysis, instrumentation, data processing, calibration, and scientific reporting. It prepares students for advanced laboratory work and industrial practice.

Course Objectives

At the end of the course, students should be able to:

1. Demonstrate proper laboratory safety and ethical conduct

2. Use physical laboratory instruments accurately

3. Apply correct measurement and calibration techniques

4. Analyze experimental errors and uncertainties

5. Record, analyze, and present laboratory data effectively

Learning Outcomes

Students should be able to:

• Identify laboratory apparatus and their functions

• Perform precise physical measurements

• Apply error analysis to experimental results

• Prepare standard scientific laboratory reports

Teaching Methods

Lectures, demonstrations, laboratory practicals, group work, discussions

Assessment

• Continuous Assessment (Tests, Practical Reports): 40%

• End‑of‑Semester Examination (Theory & Practical): 60%

SECTION B: LECTURE‑BY‑LECTURE NOTES

Lecture 1: Introduction to Physical Laboratory Techniques

• Meaning of laboratory techniques

• Importance of physical laboratories

• Classification of laboratories

• Good laboratory practice (GLP)

Lecture 2: Laboratory Safety and Ethics

• Laboratory hazards (chemical, electrical, mechanical)

• Safety symbols and signs

• Personal protective equipment (PPE)

• Laboratory ethics and conduct

Lecture 3: Measurement and SI Units

• Fundamental and derived quantities

• SI base units

• Precision vs accuracy

Lecture 4: Errors and Uncertainty

• Types of errors: systematic, random, gross

• Sources of errors

• Minimization of errors

Lecture 5: Vernier Caliper

• Construction and principle

• Least count determination

• Zero error correction

Lecture 6: Micrometer Screw Gauge

• Parts and working principle

• Least count

• Applications

Lecture 7: Mass Measurement

• Beam balance

• Electronic balance

• Sensitivity and calibration

Lecture 8: Mid‑Semester Test

Lecture 9: Time Measurement

• Stopwatches and timers

• Reaction time

Lecture 10: Temperature Measurement

• Thermometers and temperature scales

• Calibration techniques

Lecture 11: Graphs and Data Analysis

• Plotting experimental graphs

• Interpretation of slopes and intercepts

Lecture 12: Laboratory Report Writing

• Title, aim, apparatus

• Theory, procedure

• Results, discussion, conclusion

Lecture 13: Instrument Calibration and Maintenance

• Importance of calibration

• Care of laboratory equipment

SECTION C: PRACTICAL MANUAL WITH EXPERIMENTS

Experiment 1: Laboratory Safety and Apparatus Identification

Aim: To familiarize students with laboratory rules and equipment

Experiment 2: Measurement of Length Using Vernier Caliper

Aim: To measure internal and external diameters accurately

Experiment 3: Measurement Using Micrometer Screw Gauge

Aim: To measure small thickness and diameter

Experiment 4: Measurement of Mass Using a Balance

Aim: To determine mass of given objects

Experiment 5: Time Measurement Using Stopwatch

Aim: To determine period of oscillation

Experiment 6: Temperature Measurement and Calibration

Aim: To calibrate a thermometer

Experiment 7: Graphical Analysis of Experimental Data

Aim: To plot and interpret experimental graphs

Experiment 8: Instrument Calibration

Aim: To calibrate basic laboratory instruments

SECTION D: ASSESSMENT RUBRICS AND MARKING GUIDES

Practical Report Marking Guide (20 Marks)

• Title and Aim – 2 marks

• Apparatus – 2 marks

• Theory – 4 marks

• Procedure – 4 marks

• Results & Calculations – 4 marks

• Discussion & Conclusion – 3 marks

• Neatness & Presentation – 1 mark

Practical Examination Marking Guide (40 Marks)

• Experimental setup – 10 marks

• Measurement accuracy – 10 marks

• Calculations – 10 marks

• Safety & conduct – 5 marks

• Result presentation – 5 marks

Continuous Assessment

• Quizzes – 10%

• Practical reports – 15%

• Mid‑semester test – 15%

RECOMMENDED TEXTBOOKS

1. Squires, G. L. Practical Physics, Cambridge University Press

2. Taylor, J. R. An Introduction to Error Analysis, University Science Books

3. Departmental Physical Laboratory Manual

Prepared by: Agboola Akeem Babatunde
Department: Physics and Engineering Physics
Date: 8/2/2026

Lesson Plan on SLT 203 from Copilot

Physical Laboratory Techniques (SLT 203)

Course Level

Undergraduate (200 level)

Duration

3 hours (2 hours theory + 1 hour practical)

Learning Objectives

By the end of the lesson, students should be able to:

• Identify and correctly use basic physical laboratory equipment.

• Apply safety protocols in handling instruments and materials.

• Demonstrate measurement techniques (length, mass, volume, and temperature).

• Understand calibration and error analysis in physical experiments.

• Record and interpret experimental data accurately.

Lesson Outline

See the table for details.

Teaching Methods

• Lecture: Introduce concepts and safety rules.

• Demonstration: Show correct use of instruments.

• Hands-on practice: Students perform measurements and record data.

• Collaborative learning: Group discussions on error sources and data interpretation.

• Assessment: Short quiz and observation of practical skills.

Assessment Strategy

• Formative: Observation during practicals, oral questioning.

• Summative: End-of-class quiz (MCQs + short answers).

• Lab Report: Students submit a structured report on their measurements and error analysis.

Materials Needed

• Vernier calipers, micrometer screw gauge

• Analytical balance

• Thermometers

• Pipettes, burettes, measuring cylinders

• Safety goggles, lab coats

• Lab manuals and notebooks

Sample Practical Exercise

Experiment: Measurement of density of a solid object

• Measure mass using analytical balance.

• Measure dimensions using vernier caliper/micrometer.

• Calculate volume and density.

• Compare with standard values and discuss possible errors.

Week 3: Measurement of Length and Diameter

Objective: Learn to use vernier calipers and micrometer screw gauge.

 Materials: Vernier caliper, micrometer screw gauge, metal rods, wires.

Procedure:

1. Adjust vernier caliper to measure the diameter of a rod. Record readings.

2. Repeat three times for accuracy.

3. Use micrometer screw gauge to measure wire thickness.

4. Record values and calculate mean diameter.

Assignment: Submit a table of measurements with calculated averages.

Week 4: Measurement of Mass and Volume

Objective: Measure mass and liquid volume accurately.

Materials: Analytical balance, pipette, burette, measuring cylinder.

Procedure:

1. Weigh a solid sample using analytical balance.

2. Measure 10 mL of water using pipette, burette, and cylinder separately.

3. Compare precision of each instrument.

Assignment: Write a short report comparing accuracy of instruments.

Week 5: Temperature Measurement and Calibration

Objective: Calibrate thermometer using fixed points.

Materials: Mercury thermometer, digital thermometer, ice bath, boiling water.

Procedure:

1. Place thermometer in ice bath (0°C). Record reading.

2. Place thermometer in boiling water (100°C). Record reading.

3. Plot calibration curve.

Assignment: Submit calibration graph with error analysis.

Week 6: Density Determination

Objective: Determine density of solid and liquid samples.

Materials: Balance, vernier caliper, measuring cylinder, water.

Procedure:

1. Measure mass of solid sample.

2. Measure dimensions and calculate volume.

3. Calculate density = mass/volume.

4. For liquids, measure mass of known volume.

Assignment: Compare experimental density with literature values.

Week 7: Viscosity & Surface Tension

Objective: Measure viscosity and surface tension.

Materials: Ostwald viscometer, capillary tubes, liquids.

Procedure:

1. Use viscometer to measure flow time of liquid.

2. Calculate viscosity using formula.

3. Measure capillary rise in tube to determine surface tension.

Assignment: Explain industrial applications of viscosity and surface tension.

Week 8: Optical Techniques

Objective: Use spectrophotometer and refractometer.

Materials: Spectrophotometer, refractometer, solutions of varying concentration.

Procedure:

1. Measure absorbance of solutions at specific wavelength.

2. Plot absorbance vs. concentration graph.

3. Use refractometer to measure refractive index of liquids.

Assignment: Submit graph and refractive index values.

Week 9: Electrical Measurements

Objective: Measure resistance, voltage, and conductivity.

 Materials: Multimeter, conductivity meter, resistors, solutions.

Procedure:

1. Use multimeter to measure resistance of resistor.

2. Measure voltage across circuit.

3. Test conductivity of distilled vs. tap water.

Assignment: Compare conductivity values and explain differences.

Week 10: pH & Electrochemical Techniques

Objective: Calibrate pH meter and measure pH.

Materials: pH meter, buffer solutions, household liquids.

Procedure:

1. Calibrate pH meter using standard buffers.

2. Measure pH of 5 different solutions.

3. Record values in table.

Assignment: Submit table with analysis of acidic vs. basic samples.

Week 11: Error Analysis & Uncertainty

Objective: Understand error propagation.

Materials: Sample data sets.

Procedure:

1. Identify sources of systematic and random errors.

2. Calculate uncertainty using error propagation formulas.

3. Apply to previous experiments.

Assignment: Solve 5 error analysis problems.

Week 12: Data Recording & Scientific Reporting

Objective: Learn proper lab notebook keeping.

Materials: Lab notebook, sample reports.

Procedure:

1. Review sample lab report.

2. Practice writing structured report (Aim, Materials, Procedure, Results, Discussion).

Assignment: Draft report from Week 6 experiment.

Week 13: Mini-Project

Objective: Design and conduct a simple experiment.

Procedure:

1. Choose experiment (e.g., density, pH, conductivity).

2. Plan method and materials.

3. Conduct experiment and record data.

4. Prepare report and presentation.

Assignment: Submit final report and present findings.

Lesson Plan on SLT 203 from Google Gemini

Lesson Plan for SLT 203: Physical Laboratory Techniques.

This course is designed for undergraduate students (typically 200-level Science Laboratory Technology or Physics students) to build foundational skills in conducting experiments, handling apparatus, and analyzing data.

Course Overview

• Course Code: SLT 203

• Course Title: Physical Laboratory Techniques

• Duration: 1 Semester (12–14 Weeks)

• Level: Undergraduate (200 Level)

• Prerequisites: General Physics I & II (PHY 101/102)

Course Objectives: By the end of this course, students should be able to:

1. Demonstrate proficiency in using precision measuring instruments.

2. Set up and calibrate optical, electrical, and thermal laboratory equipment.

3. Analyze experimental data using statistical methods and error analysis.

4. Write professional, scientific laboratory reports.

5. Observe safety protocols in a physical science laboratory.

Weekly Schedule and Topics

Module 1: Measurement, Precision, and Data Analysis (Weeks 1–3)

Focus: Mastering the tools of the trade and understanding experimental uncertainty.

Week 1: Introduction to the Laboratory & Safety

• Theory: Lab safety rules, electrical safety, handling fragile optical equipment, and emergency procedures.

• Activity: Lab orientation, safety quiz, and introduction to logbooks.

Week 2: Precision Measurement Instruments

• Theory: Principles of Vernier scales, screw threads, and reading errors.

• Practical:

  • Using Vernier Calipers to measure internal/external diameters.

  • Using Micrometer Screw Gauges to measure the thickness of wires and sheets.

  • Using the Spherometer to determine the radius of curvature of a lens.

Week 3: Error Analysis and Graphing

• Theory: Types of errors (random vs. systematic), significant figures, error propagation, and linear regression.

• Activity: Students analyze data from Week 2 to calculate density with error limits. Introduction to graphing software (Excel/Origin) vs. manual plotting.

Module 2: Properties of Matter (Weeks 4–6)

Focus: Mechanical properties of solids and liquids.

Week 4: Elasticity and Hooke’s Law

• Theory: Stress, strain, Young’s Modulus, and elastic limits.

• Practical:

  • Determination of Young’s Modulus of a wire using a Vernier scale setup.

  • Verification of Hooke’s Law using a spiral spring.

Week 5: Surface Tension and Viscosity

• Theory: Fluid dynamics, capillary action, and terminal velocity.

• Practical:

  • Determining surface tension using the Capillary Rise Method.

  • Determining the coefficient of viscosity of a liquid using Stokes’ Law (falling sphere method).

Week 6: Simple Harmonic Motion (SHM)

• Theory: Periodic motion, restoring force, and gravity.

• Practical:

  • Determination of acceleration due to gravity ($g$) using a Compound Pendulum (Kater’s or Bar pendulum).

  • Comparison with a simple pendulum to discuss accuracy and center of mass.

Module 3: Optics and Light (Weeks 7–9)

Focus: Geometrical optics and wave properties of light.

Week 7: Reflection and Refraction

• Theory: Snell’s law, refractive index, and total internal reflection.

• Practical:

  • Determination of the refractive index of a glass prism using a Spectrometer.

  • Determination of the refractive index of a liquid using a concave mirror.

Week 8: Lenses and Optical Instruments

• Theory: Focal lengths, lens maker’s formula, and magnification.

• Practical:

  • Determination of the focal length of a convex lens using the displacement method.

  • Setting up an Optical Bench to simulate a compound microscope.

Week 9: Wave Optics (Interference)

• Theory: Wave nature of light, interference patterns, and monochromatic light.

• Practical:

  • Determination of the radius of curvature of a lens using Newton’s Rings.

  • (Optional) Using a diffraction grating to find the wavelength of light sources.

Module 4: Electricity and Magnetism (Weeks 10–12)

Focus: Circuit analysis and magnetic fields.

Week 10: Precision Electrical Measurements

• Theory: Resistance, resistivity, and circuit bridges.

• Practical:

  • Verification of Ohm’s Law.

  • Determination of unknown resistance using a Wheatstone Bridge.

  • Using a Metre Bridge to determine the specific resistance of a wire.

Week 11: Potentiometers and EMF

• Theory: Electromotive force (EMF), internal resistance, and potential dividers.

• Practical:

  • Calibration of a voltmeter using a Potentiometer.

  • Comparison of EMFs of two cells (Daniel vs. Leclanché cells).

Week 12: Magnetism

• Theory: Magnetic fields, moments, and the Earth's magnetic field.

• Practical:

  • Mapping magnetic lines of force.

  • Determination of the horizontal component of Earth’s magnetic field using a Deflection Magnetometer.

Recommended Textbooks

1. Advanced Level Practical Physics by Nelkon and Parker.

2. Practical Physics by G.L. Squires (Excellent for error analysis).

3. B.Sc. Practical Physics by C.L. Arora.