Many Intermediate students feel confused before physics practical exams because they don’t clearly understand the paper pattern, experiment list, and graph questions. This guide on Physics Practical Model Papers Lahore Board presents the complete model paper in a simple, clean, and student-friendly format, so you can prepare with confidence and avoid last-minute confusion.
Physics Practical Paper Overview
- Subject: Physics (Practical)
- Level: Intermediate
- Time Allowed: 3 Hours
- Maximum Marks: 30
Important Instruction
Students must mark two experiments from Section I and two experiments from Section II separately.
The practical examiner will select one experiment from each section for performance in the examination.
Section I – Practical Experiments (10 Marks Each)
This section focuses on measurements, optics, and thermal properties.
Experiments Included
- Determine the area of cross-section of a wire and volume of a small sphere using a micrometer screw gauge.
- Find the coefficient of linear expansion of the material of a rod using Pullinger’s apparatus.
- Evaluate the refractive index of a liquid using a concave mirror.
Student Tip:
Accuracy, correct formula application, and proper observation table are key to scoring full marks in this section.
Section II – Electrical & Electronics Experiments (10 Marks Each)
This section tests your understanding of current electricity and basic electronics.
Experiments Included
- Determine the resistance of a galvanometer by half-deflection method and calculate the electric current for full scale.
- Justify the characteristics of an NPN transistor.
- Convert a galvanometer into a voltmeter with a range of 0–3 V.
Student Tip:
Learn circuit diagrams clearly and prepare short explanations for viva questions.
Section III – Graph Questions
Attempt only ONE question from this section.
Question 7: Graph Between W and 1/W
Draw a graph using the given data and determine the reciprocal of 5.4 from the graph.
Take W along the x-axis.
Table A: Values of W
| W (Unit) |
|---|
| 0 |
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
Table B: Corresponding Values of 1/W
| 1/W (Unit⁻¹) |
|---|
| ∞ |
| 1 |
| 0.5 |
| 0.33 |
| 0.25 |
| 0.20 |
| 0.17 |
| 0.14 |
| 0.12 |
| 0.11 |
| 0.1 |
What this data shows:
As the value of W increases, the value of 1/W decreases, showing an inverse relationship.
Question 8: Graph Between Frequency (ν) and Stopping Potential (V₀)
Plot a graph between ν and V₀, taking ν along the x-axis.
Determine Planck’s constant (h) using the formula:
h = m × e
Where:
- m = slope of the graph
- e = 1.60 × 10⁻¹⁹ C (electronic charge)
Table C: Experimental Data
| Frequency ν (×10¹⁴ Hz) | Stopping Potential V₀ (Volt) |
|---|---|
| 4.80 | 1.56 |
| 5.10 | 1.68 |
| 5.70 | 1.91 |
| 6.40 | 2.19 |
| 7.00 | 2.42 |
What this data shows:
This table is used to verify the photoelectric effect and calculate Planck’s constant from the slope of the graph.
Section IV – Assessment Marks
| Component | Marks |
|---|---|
| Practical Note Book / Lab Journal | 3 |
| Viva Voce (Oral / Verbal Activity) | 3 |
Student Tip:
A neat lab journal and confident viva answers can easily secure full marks here.Also Read About: Biology Practical Model Papers Lahore Board (Intermediate)
How to Prepare Smartly for Physics Practical
- Practice at least one experiment from each section
- Memorize formulas, units, and least count
- Learn proper graph drawing techniques
- Keep your lab journal complete and tidy
- Prepare short and clear viva answers
Final Words
Understanding the Physics Practical Model Papers Lahore Board pattern is the first step toward success. When you know the experiments, graph questions, and marking scheme in advance, preparation becomes easy and stress-free. Use this structured guide, practice regularly, and enter the practical exam with full confidence.