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⚡ This Physics Grade 9 Guess Paper 2026 (FBISE) is prepared using past board papers and model papers. It includes the most important conceptual questions, numerical, and repeated topics to help you prepare effectively and score maximum marks.
⚡ Physics Guess Paper Grade 10 (FBISE 2026)
Chapter 10
- Use of large specific heat capacity
- Convection and its applications
- Applications of heat transfer
- Numerical Problems: 2, 3, 4, 6
- Why temperature of land rise and fall quickly on land than at sea?
- Why wooden handle is used in frypans?
- How birds able to fly using thermal convection?
- Different applications of heat transfer?
- What is land and sea breeze?
- How heat reaches our earth from sun?
- What is specific heat capacity?
Chapter 11
- Thermal expansion in Solids
- Thermal expansion in Liquids
- Evaporation and Boiling
- Numerical Problems: 2, 5, 6
- Important Questions
1. Describe qualitatively the thermal expansion of solids
2. A solid cube of side length 5cm at 15C is heated. Calculate its (a) initial volume (b) increase in its volume (c) final volume at 100C. (Coefficient of volume expansion of this solid is 9×10-6 K-1).
3. Differentiate between boiling and evaporation.
4. Derive the relations for volumetric and linear thermal expansion
Chapter 12
- Wave Motion and its types
- Properties of waves
- proof speed=frequency x wavelength
- Numerical Problems: 1, 2, 3, 5
- Important Questions:
1. Difference between electromagnetic waves and mechanical waves OR which type of wave do not require any material medium for their propagation
2. Difference between transverse or longitudinal waves with examples and diagrams?
3. Derive v=fλ
4. What is the effect of wavelength on diffraction pattern
5. What happens to the waves when it moves from deep to shallow water or vice versa
Chapter 13
- Medium for propagation of sound wave
- Terms related to sound wave
- Types of sound waves
- Characteristics of sound waves
- Echo and Acoustics
- Numerical Problems: 2, 5, 6, 7
- Important Questions1. How can we calculate the depth of the sea by using an echo? Look at the two wave forms shown. Which of the following has a higher pitch? Why?2. What are the factors that affect the loudness of sound?3. What is the difference between pitch and loudness?4. Explain why the speed of sound follows this order: solids > liquids > gases.5. Prove that sound waves require a material medium for their propagation. Prove that sound waves are longitudinal in nature. What is the difference between compression and rarefraction?6. What is the relation between time period (T) and frequency (f)?7. What is the difference between ultrasonic and infrasonic sound waves? List some medical uses of sound waves.8. What is the SONAR technique?9. What is the difference between noise and music?10. What are the necessary conditions to produce an echo?
Chapter 14
- Laws of Reflection, Refraction
- Total Internal Reflection and its applications
- Lenses and its applications
- Ray Diagrams
- Table 14.3
- Numerical Problems: 2, 4, 5
- Important Questions
State laws of reflection and refraction
What are the conditions of Total Internal Reflection.
What is critical angle. Its relevant numerical
What is Snell's law. Derive its relation.
What ate the advantages of optical fiber over copper-based wire? What is its working principle?
Define the terms related to lens:
focal length Principal axis Principal focus Optical centre Centre of curvature
Difference between converging and concave lens?
Draw ray diagram at different positions of objects?
Difference between real and virtual image?
Chapter 15
- Electroscope
- Electric field lines
- Applications of electrostatics
- Numerical Problems: 3, 4, 5, 6
- Important Questions
1. What is electric field intensity? Is it a vector quantity? Explain.
2. What are the properties of electric field lines? Draw electric field lines between: two opposite charges and two same charges
3. What is the working principle of a photocopier machine
4. Table 15.1.
5. Charging, Discharging, and Electroscope
6. Describe the method of charging an insulated metal sphere by induction. How can we discharge an insulator by heating or by exposing it to humid conditions
7. Electroscope construction? How to detect charge on a rod? How to detect the type of charge on a rod? How to charge an electroscope? How to detect a conductor and insulator?
Chapter 16
- Alternating current and direct current
- Potential Difference
- E.M.F.
- Ohm's Law
- Resistance
- Numerical Problems: 3, 5, 6, 8
- Important Question:
- Difference between alternating and direct current?
- Differentiate between potential difference and EMF?
- Define Ohm law and write its limitations?
- Difference between ohmic and non ohmic conductors?
Chapter 17
- Resistors and its types
- Combinations of resistors + Examples
- Electrical Energy + Electric Power
- Numerical Problems: 2, 4, 5
- Important Questions:
- What are the factors that affect resistance?
- Derive relations for electric power and energy?
- Calculate energy in KWh and associated numericals?
- Derive the relation for equivalent resistance for series and parallel combination?
Chapter 18
- Semiconductors and its types
- Characteristics of diode under biasing
- Transistors and its types
- Logic Gates and their uses
- Numerical Problems: 2, 3
- Important Questions:
- Differentiate between forward and reverse biased
- Differentiate between N type and P type semiconductor? Complete topic including majority and minority charge carriers?
- Explain the working, truth table and action of logic gates for AND, OR, NAND, NOR and NOT?
Chapter 19
- Magnetic field due to solenoid
- Force on a current carrying conductor in a magnetic field
- Electric Motor
- Electromagnetic Induction
- Electric Generator
- Transformer
- Numerical Problems: 1, 2, 4, 5
- Important Questions:
- Describe the term electromagnetic induction and how it work?
- Which factors affect the magnitude of emf?
- Describe Lenz law and how it manifestation pf law of conservation of energy?
- What is transformers? Its applications? Working of step up and down transformer?
Chapter 20
- Electromagnetic Spectrum
- Nature of light
- Scattering of light
- Table 21.1
- Numerical Problems: 3, 4, 6
- Important Questions
What is Electromagnetic spectrum and EMW? How electromagnetic waves are divided into different regions based on their energy?
Why sun appear blue during day and orange red during dawn.
What is the true nature of light? Discuss
Chapter 21
- Isotopes and Radioisotopes
- Radioactive decays
- Half life
- Nuclear Fission and Fusion (Long)
- Numerical Problems: 3, 5, 7, 10
- Important Questions:
What is alpha beta and gamma decay. Write it general equation with example.
Which of the following has highest penetrating power and high ionization power. Alpha beta or gamma
Table 21.1
What is half-life and decay curve? Derive its relations.
Perform numerical related to half life
Short Questions
i) Show that Lenz's Law follows the conservation of energy with an example.
OR
Why does the sky appear blue during the day?
ii) Can we achieve total internal reflection by passing light from less denser medium to more denser medium? Explain.
OR
Why wet clothes dry up quickly in summer than in winter?
iii) How do longitudinal waves differ from transverse waves? Give some real-life examples of longitudinal and transverse.
OR
Calculate the speed of light in a medium of refractive index 1.5.
iv) What is meant by biasing of a diode? What are the types of biasing?
OR
What are the common methods used to discharge an insulator? Briefly elaborate any one method.
v) What is the cost of running four light bulbs of 100 watts each for 6 hours in a school for a month? Cost of electricity unit is Rs. 12 per kWh.
OR
What is meant by isotope of an element? Give examples of three isotopes of any element.
vi) Define electric field. How is it expressed mathematically? Is it a vector quantity?
OR
Define the term E.M.F. Is it really a force?
vii) A step down transformer converts 240V into 12V. If there are 2000 turns on the primary coil, then find the number of turns on the secondary coil.
OR
You often see lightning before hearing thunder. Why?
viii) When will a converging lens act as a magnifying glass? Show it by a ray diagram.
OR
A radioactive substance has a half-life of 6 hours. Its initial amount is 300 grams. Calculate the amount left after 18 hours.
ix) Elaborate the differences between alternating current and direct current by using current-time graphs.
OR
Two identical batteries, each with an e.m.f of 1.5 V, are connected (a) in series and (b) in parallel. Calculate the total e.m.f in each case.
x) Explain how food is preserved through deposition?
OR
Differentiate b/w Noise and Music. (any three)
xi) A convex lens with a focal length of 10cm produces a linear magnification of 3. A 5cm tall object is placed 30 cm in front of it. Calculate the image distance and the height of the image formed.
OR
How does the wavelength of a wave change its frequency?
LONG QUESTIONS
Q3. Three resistors 5 Ω, 13 Ω and 17 Ω are connected in parallel combination across 30V battery. Calculate the equivalent resistance, total current and current across each resistor?
OR
What is nuclear fusion reaction? Write down steps involved in proton-proton cycle. What is cause of energy in nuclear fusion?
Q4. Explain the phenomenon of total internal reflection. What are the necessary conditions for total internal reflection? Derive formula for refractive index of a medium in terms of critical angle.
OR
A solid cube of side length 5cm at 15°C is heated. Calculate its (a) initial volume (b) increase in its volume (c) final volume at 100°C. (Coefficient of volume expansion of this solid is 9 x 10-6 K-1)
Q5. What is meant by transformer? Explain the working of a simple iron-core transformer. Give transformer eqn.
OR
Differentiate between digital and analogue electronics. What makes digital system better than analogue system?
Q6. Draw a comparative sketch illustrating the loudness and pitch of sound waves. Also give their brief description.
OR
What is conduction? Explain it on the basis of kinetic theory of solids. What makes metals better conductors than other substances?