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[4/28, 6:54 PM] 😊: 9th/Class 9 Class Physics Guess 2023.

Physics Pairing (Class 9) All Bise(Punjab)


Unit # 1:
1. Differentiate between base and derived quantities. Give one example of each
2. What is science?
3.define physics
✓Estimate your age in second
✓What role SI units have played in the development of science?
4. What is meant by vernier constant?
5. What is stop watch?
6. What is meant by significant figures of a measurement?
7. Write a short note Vernier Callipers.
8. Write a short note on Screw Gauge.
9. What is the function of physical balance?
Unit # 2:
1. Can a body moving at a constant speed have acceleration?
2. Define the term speed, velocity, and acceleration.
3. Define the term position, distance, Displacement.
4. Why vector quantities cannot be added and subtracted like scalar quantities?
5. Differentiate between uniform acceleration and uniform velocity.
6. Differentiate between Scalar and vector.
7. Define the following terms.
Rest and motion
Translatory motion, linear motion, Random motion, Circular motion
Rotatory Motion, Vibratory Motion.
Gravitational Acceleration
Unit # 3:
1. Define the following terms:
Inertia, Momentum, Force, Force of Friction, Centripetal Force, Centrifugal Force,
2. What is the law of inertia?
3. Why is it dangerous to move on the roof of a bus?
4. What is the law of conservation of momentum?
5. Think of a body which is at rest but not in equilibrium.
6. When a gun is fired, it recoils. Why?
7. Describe the two situations in which force of friction is needed.
8. Describe the ways to reduced friction.
9. State Newton’s first law of motion.
10. State Newton’s third law of motion.
11. Differentiate between Mass and Weight.
12. Define Friction and force of limiting friction.
13. Define coefficient of friction.
Unit # 4:
1. Define the following:
Resultant vector
Torque
Centre of Mass
Centre of Gravity
Like and unlike Parallel forces
Couple
Moment Arm
Stable, Unstable, Neutral Equilibrium
2. How head to tail rule helps to find the resultant of forces?
3. When a body is said to be in equilibrium?
4. Explain the first condition for equilibrium.
5. What is second condition for equilibrium?
6. Give an example of a moving body which is in equilibrium.
7. Define Equilibrium with example.
8. Differentiate between clockwise moment and anti clock wise moment.
9. Differentiate between Centre of gravity and Centre of mass.
Unit # 5:
1. What is meant by force of Gravitation?
2. What is a field force?
3. What is meant by gravitational field strength?
4. Explain the law of gravitation.
5. Why the value of g does varies from place to place.
6. What is satellite?
7. Why law of gravitation is important to us?
8. What are artificial satellites?
9. Define geostationary orbit.
10. On what factors the orbital speed of a satellite depends?
11. Why communication satellites are stationed at geostationary orbits?
Unit # 6:
1. Define work. What is its SI unit?
2. When does a force do work? Explain
3. Why do we need energy?
4. Define energy; give two types of mechanical energy.
5. Name five devices that convert electrical energy into mechanical energy.
6. Name a device that converts mechanical energy into electrical energy.
7. What is meant by the efficiency of a system?
8. How can you find the efficiency of a system?
9. What is meant by the power?
10. Define watt.
11. How can we produce energy from a biomass?
12. Which form of energy is most preferred and why?
Unit # 7:
1. What is meant by density? What is SI unit?
2. Define term pressure.
3. Can we use a hydrometer to measure the density of milk?
4. What is barometer?
5. Why water is not suitable to use in a barometer?
6. Why does atmospheric pressure vary with height?
7. State pascal’s law.
8. What is meant by elasticity?
9. State Archimedes principle.
10. What is up thrust?
11. Explain the principle of flotation.
12. What is hook’s law? What is meant by elastic limit?
13. Differentiate between Strain and Tensile Strain.
Unit # 8:
1. Why does heat flow from hot body to cold body?
2. Define the term heat and temperature.
3. What is thermometer?
4. Define specific heat Capacity.
5. Define latent heat of fusion.
6. Define latent heat of vaporization.
7. What is meant by evaporation?
8. What is bimetal strip? What are its uses?
9. Define Heat capacity.
10. Convert the temperature from Celsius to Kelvin scale.
11. Convert the temperature from Kelvin to Celsius scale.
12. Convert the temperature from Celsius to Fahrenheit scale.
Unit # 9:
1. Why metals are good conductor of heat?
2. Why conduction of heat does not take place in gases?
3. What is meant by convection current?
4. How does heat reach us from the sun?
5. What is greenhouse effect?
6. Define conduction.
7. Define convection.
8. Define radiation

Guess by Mian Muhammad Jafir


Unit # 1:
1. Vernier Callipers.
2. Screw Gauge.
Unit # 2:
1. Proof that Vf= Vi + at
2. Proof that S = Vit +
1
2
at2
3. Proof that 2aS = Vf
2
- Vi
2
Unit # 3:
1. State Newton’s second law of motion.
2. What is Law of conservation of momentum?
3. Force and the momentum.
Unit # 4:
1. Resolution of forces.
2. Determination of a force from its perpendicular components.
3. Conditions for equilibrium.
Unit # 5:
1. Law of Gravitation.
2. Mass of the Earth.
3. Motion of artificial satellites.
Unit # 6:
1. Define K.E and derive its relation.
2. Define P.E and derive its relation.
3. Forms of energy.
5. Re-newable sources.
Unit # 7:
1. Pascal’s law and applications of pascal’s law.
2. Archimedes Principle.
3. Young’s Modulus.
Unit # 8:
1. What is meant by evaporation? On what factors the evaporation of a
liquid depends.
2. Explain thermal expansion of solids.
3. Explain thermal expansion of volume.
4. Explain thermal expansion of liquids.
Unit # 9:
1. What is green house effect?
2. Explain the impact of green house effect in global warming.
3. Emission and absorption.
4. Thermal conductivity and its factors.
4. Major sources of energy.


paper
*9th physics*
*Guess Paper 2023*
[4/28, 7:19 PM] 😊: Important Numerical
Ch 2
1,2,3,4,6
example 1,4،6

Ch3
Example
1,2,3,6,8
Numerical 1,2,3,4,5,6,8,9,10

Chapter 4
example 1,2
numerical 2,3,4,5,6,7,9

Chapter 5
example 1
numerical 1,2,3,4,5،7,9

Chapter 6
example 1,2,3,4,5,7
numerical 1,2,3,4,6,7,9

Chapter 7
example 1,2,3,4,6,7
numerical 1,2,3,4,5,6,8,9,12

Chapter 8
example 1,2,3,4,5,6
numerical 2,3,4,5,7,9

Chapter 9
Example 1, 2
Numerical 1,2