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**Guess Paper 2023 Punjab Board** **9th Class Physics**

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**Punjab Board** **9th Class Physics Guess Paper 2024**

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**Physics Guess Paper 2025 Punjab Board** **9th Class**

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**Physics 9th Class Guess Paper**

Physics 9th Class Guess Paper 2023 Short Question | View – Download |

Physics 9th Class Guess Paper 2023 long & Numerical | View – Download |

## UNIT NO. 1

### PHYSICAL QUANTITIES AND MEASUREMENT

#### MULTIPLE CHOICE:

- The number of significant figures in 0.00580 km is.

- 5
- 6
- 3
- 2
- The number of base units in SI are.

- 5
- 6
- 7
- 9
- Amount of a substance in term of number is measured in.

- Gram
- Kilogram
- Newton
- Mole
- An interval of 200 micro second is equivalent to.

- 0.2 s
- 0.02 s
- 2 x 10
^{-4}s - 2 x10
^{-6}s - The smallest quantity among these is.

- 0.01 g
- 2 mg
- 100 g
- 5000 mg

### SHORT QUESTIONS:

- Define base quantities.
- Write down rules to find the significant digits.
- Define base quantities and units.
- What is meant by significant figures? How many significant figures are in?
- Define physical quantities and derived quantities.
- What is vernier calipers? Write the least count of vernier calipers.
- What role SI Units have played in the development of science.

### LONG QUESTIONS:

### NO LONG QUESTIONS IN THIS CHAPTER.

## UNIT NO. 2

__KINEMATICS.__

__KINEMATICS.__

### MULTIPLE CHOICE:

- Falcon can fly at speed of.

- 200 kmh
^{-1} - 17 kmh
^{-1} - 100 kmh
^{-1} - 70 kmh
^{-1} - The acceleration of a body failing down freely is approximately.

- 10 m
^{2}s^{-2} - 10 ms
^{-2} - 10 ms
^{-1} - 10 m
^{2}s^{-1} - Which of the following is a vector quantity.

- Speed
- Distance
- Displacement
- Power
- If an object is moving with constant speed than its distance –time graph will be a straight line.

- Along time- axis
- Along distance-axis
- Parallel to time-axis
- Inclined to time –axis
- By dividing displacement of a moving body with time we obtain.

- Speed
- Velocity
- Displacement
- Distance
- 36 kmh
^{-1}is equal to.

- 10 ms
^{-1} - 20 ms
^{-1} - 25 ms
^{-1} - 50 ms
^{-1}

### SHORT QUESTIONS:

- How is a vector represented?
- Differentiate between variable and uniform speed.
- Define speed and write its units.
- Convert 50 kmh
^{–}1 speed of a body into ms^{-1} - What is difference between positive acceleration and negative acceleration?
- Define uniform velocity
- Define uniform speed and uniform velocity
- Define gravitational acceleration and write its value is SI units.
- Write equation of motion for uniformly acceleration motion.
- A train starts from rest with an acceleration of 0.5 ms
^{-2}. Find its speed in Kmh^{-1}. When it has moves through 100 m. - How can vector quantities be represented graphically?

### LONG QUESTIONS/NUMERICAL:

- Example 2.5
- Derive second equation
- Prove with the help of graph Vf – Vi + at
- Prove it graphically by diagram s = vit + ½ at
- A car has a velocity of 10 ms-1 if acceleration at 0.75 for half minute. Find the distance travelled during this time and final velocity of the car.
- A stone is dropped from the top of a tower. The stone hits the ground after 5 seconds. Find (i) The height of tower (ii) The velocity with which the above hits the ground.
- Drive third equation of motion.

## CHAPTER NO.3

__DYNAMICS__

__DYNAMICS__

**MULTIPLE CHOICE:**

- Equation of momentum is.

- P = m/v
- P = mv
^{2} - P = (mv)
^{2} - P = mv
- One Newton is unit of force and is equal to.

- 1 kg ms
^{-2} - 1 kg
^{-1 }s^{-1} - 1 gms
- 1 kgm
^{-1 }s - The force oppose the motion of a moving object is called.

- Momentum
- Friction
- Power
- Work
- Coefficient of friction meo between the tyre and wet road is.

- Q.2
- 0.6
- 0.8
- 1
- First law of Newton is applicable in the absences of which of the following.

- Force
- Net force
- Friction
- Momentum

### SHORT QUESTIONS:

- Define Newton’s second law of motion and give equation.
- Define Inertia and momentum.
- State Newton’s third law of motion and write two examples.
- Write difference between Mass and Weight.
- When a gun is fired, it recoiled why.
- Give two examples of law of conservation of momentum.
- Why rolling friction is less than sliding friction?
- What is Atwood Machine? Give its one use. Define force and its unit.

### LONG QUESTIONS:

- How much time is required to change 22 Ns momentum in a body by a force of 20 N?
- State Newton’s first law of motion. Why is it called law of inertia?
- Define rate of change of momentum and also drive its equation.
- State second law of motion and drive equation f = ma.
- A body has weight 20 N. How much force is required to move it vertically upward with an acceleration of 2 ms
^{-2}

__CHAPTER NO.4.__

### TURNING EFFECT OF FORCES.

### MULTIPLE CHOICE:

- The number of perpendicular components of a vector is.

- 1
- 2
- 3
- 4
- The centre of gravity of irregular shaped body can be found with help of.

- Gravity
- Merle rod
- Plump line
- Screw gauge.
- Two equal but unlike parallel force having different line of action produce.

- A torque
- A couple
- Equilibrium
- Neutral aquarium.
- The number of vectors that can be added by head to tall rule is.

- 2
- 3
- 4
- Any number
- If 10 Newton force is making an angle 30 o with x-axis then value of horizontally component

- 4 N
- 5 N
- 7 N
- 0.7 N
- Racing cars made stable by.

- Increasing their speed
- Decreasing their mass
- Lowering their centre of gravity
- Decreasing their width

### SHORT QUESTIONS:

- What is resultant of force?
- What is rigid body?
- Define axis of rotation.
- When a body is said to be in equilibrium.

__LONG QUESTIONS:__

__LONG QUESTIONS:__

- What is resolution of force? Resolve of force F into its perpendicular components.
- Find a force from its perpendicular component by using a figure.
- Find the perpendicular components of a force of 50 N making an angle of 30 o with x-axis.

__CHAPTER NO. 5 __

__CHAPTER NO. 5__

### GRAVITATION:

### MULTIPLE CHOICE:

- The value of gravitational field strength near the surface of earth is.

- 20 N kg
- 30 N kg
- 5 N kg
- 10 N kg
- Mass of the earth is

- Increase in mass of the body
- Increase in altitude
- Decrease in attitude
- None of the above
- The value of g on moon’s surface is 1.6 ms-2. What will be the weight of a 100 kg body on the surface of the moon?

- 100 N
- 160 N
- 1000 N
- 1600 N

__SHORT QUESIOTNS:__

__SHORT QUESIOTNS:__

- What do you known about G? Also write its value.
- Define mass of earth.
- Why we cannot fast gravitational force around us?
- Define gravitational field.
- Give the orbital speed formula for artificial satellite.
- Define force of gravitation and give one example
- What is the height and speed of Geo stationary satellite from the surface of the earth.
- State the law of gravitation and write its formula.

### LONG QUESTIONS:

- What do you mean by artificial satellite?

## CHAPTER NO.6

## WORK AND ENERGY.

## MULTIPLE CHOICE:

- The SI unit of Power.

- Newton
- Watt
- Joule
- Coulomb
- The energy stored in a dam is.

- Electric energy
- Potential energy
- Chemical energy
- Nuclear energy
- In Einstein ‘s mass energy equation, c is the

- Speed of sound
- Speed of light
- Speed of volume
- None of these
- Rate of doing work is called.

- Energy
- Torque
- Power
- Momentum
- In a dam the water energy is called.

- Heat energy
- Electrical energy
- G.P.E
- Mechanical energy
- Einstein mass energy equation is.

- E = mc
^{2} - E = m
^{2}c - E = ½ mc
^{2} - 2 mc
^{2} - 1 kW is equal to.

- 10
^{2 }W - 10
^{3}W - 10 5 W
- 10
^{6 }W - 1 mega watt is equal to.

- 10
^{3}W - 10
^{5}W - 10
^{8}W - 10
^{6}W - The unit of work is.

- J
- N
- Ns
- m
- Work done is maximum when angle between force and displacement is.

- 45
^{o} - 0
^{o} - 60
^{o} - 90
^{o}

__SHORT QUESTIONS:__

- Define work. What is its SI unit?
- Define K.E. and derive its relation.
- A machine does 4 joule of work in 2 sec. Calculate its work.
- Define Potential energy and derive its relation.
- Define energy. Give two types of mechanical energy.
- Define unit of work.
- What is meant by the efficiency of a system?
- Define power and watt.
- What is magma?
- Write a brief note on Einstein mass energy equation.
- State law of conservation of energy.

__LONG QUESTIONS:__

__LONG QUESTIONS:__

- Explain two major renewable sources of energy.
- A motor boat moves at a steady speed of 4 ms-1 water resistance acting on it is 4000 N calculate the power of its engine.
- Explain how energy is obtained from solar house heating and solar cells.
- Calculate the power of pump which can lift 70 kg of water through a vertical height 16 meters in 10 seconds. Also find the power of the pump, convert its power into horse power.
- Explain how energy is obtained from solar house heating and solar cells.
- Calculate the power of pump which can lift 70 kg of water through a vertical height 16 meters in 10 seconds. Also find the power of the pump, convert its power into horse power.
- A man pulls a block with a force of 300 N through 50 m in 60 s. Find power used by him to pull the block.
- A 50 kg man moved 25 steps up in 20 s. Find his power if each slop is 16 cm high.

## UNIT NO. 7

### PROPERTIES OF MATTER.

**MULTIPLE CHOICE:**

- One litre is equal to.

- 1 kgm
^{-1} - 100 kgm
^{-1} - 10
^{-1}m^{-1} - 10
^{-1}m^{-1} - SI unit of pressure is.

- N
- Nm
- J
- Nm-1
- In SI system, unit of density

- Kgm-1
- K gm-2
- Kg m-3
- Kg m
- In which of the following state molecules do not leave their position.

- Solid
- Liquid
- Gas
- Plasma
- Pascal is equal to.

- 10
^{-4}Nm^{-2} - 1 Nm
^{-2} - 10
^{2}Nm^{-2} - 10
^{3}Nm^{-2}

### SHORT QUESTIONS:

- What is barometer?
- State Pascal’s law
- Difference between Stress and Strain.
- Define the term pressure. Give its S.I.unit.
- What is meant by Elasticity and Stress?
- What is meant by elasticity?
- What is Hook’s law? What is meant by elastic limit?
- How does vacuum cleaner work?
- Give three application of Pascal’s law.
- Define stress with its unit.
- Define Young’s modulus.
- Difference between Strain and Tensile of strain.
- Write two examples of applications of Pascal’s law.
- What is meant by atmospheric pressure?
- State Archimedes principle.
- State Hook’s law. What is meant by elastic limit?

### LONG QUESTIONS:

- The mass of 200 cm3 of stone in 500 g. Find as density
- A cube of glass of 5 cm side and mass 306 g has a cavity inside it. If the density of glass is 2.55 gcm-3. Find the volume of the cavity.
- A wooden block measuring 40 cm x 10 cm x 5 cm has a mass 850 g. Find the density of wood.
- The density of air is 1.3 kgm-1. Find of air in a room measuring 8m x 5m x 4m

__CHAPTER NO. 8__

__CHAPTER NO. 8__

### THERMAL PROPERTIES OF MATTER.

**MULTIPLE CHOICE:**

- Rate of flow of heat is equal to.

- Q = t
- Q
^{o}/t - Q/t
- Q/t
^{2} - SI unit of specific heat to.

- Jkg
^{-1}K^{-1} - J
^{-1}Kg-1 K^{-1} - J Kg K
- J kg-1 K
- The specific heat of iron in joules per kilogram per Kelvin is.

- 387.0
- 920.0
- 470/0
- 503.0
- The value of specific heat of dry soil is about.

- B – a alpha
- B = 3 Alpha
- B = 2 alpha
- B = 2/ alpha
- _________ Material has large specific heat.

- Copper
- Ice
- Water
- Mercury

__SHORT QUESTONS:__

__SHORT QUESTONS:__

- Define Temperature.
- How evaporation differs from vaporization.
- Define latent heat of vaporization.
- How temperature determines the direction of flow of heat.
- Define Thermal equilibrium.
- Define co-efficient of linear thermal expansion and what its SI unit is.
- Define “Volume thermal expansion’ and “temperature co-efficient of volume expansion.
- Define Latent Heat of fusion.
- What is meant by specific heat?
- Write any two uses of thermal expansion in our daily life.
- What is meant by bimetallic strip

__LONG QUESTIONS:__

__LONG QUESTIONS:__

- Define linear thermal expansion in solids. Derive its formula.
- Explain the liner thermal expansion is solids.

## CHAPTER NO.9

### TRANSFER OF HEAT.

__MULTIPLE CHOICE:__

- The way by which transfer of heat takes place are.

- 1
- 2
- 3
- 4
- The units of thermal conductivity too.

- Wmk
- Wm
^{-1}k^{-1} - Week
^{-1} - Wm
^{2}k^{-1} - Thermal conductivity of air is.

- 0.08
- 0.03
- 0.2
- 0.026
- Global warming is due to a gas.

- Oxygen
- Carbon di oxide
- Carbon mono oxide
- Chlorine
- In solids, heat is transferred by.

- Radiation
- Conduction
- Convection
- Absorption
- What happens to the thermal conductivity of a watt if its thickness is doubled?

- Becomes double
- Remain the same
- Becomes half
- Become one fourth
- Metals are good conductors of heat due to.

- Free electron
- Bigger sure of their momentum
- The smaller size of their molecules
- Rapid vibration of their atoms
- False ceiling is done to.

- Lower the height of ceiling
- Keep the root clean
- Cool the room
- Insulate the celling.
- Rooms are heated using gas heaters by.

- Conduction only
- Convection and radiation
- Radiation only
- Convection only
- Land Breeze blows from.

- Land Breeze blows from
- Sea to land might
- Sea to land during the day
- Land to sea during the day

## SHORT QUESTIONS:

- What is meant by the transfer of heat? Write the way by which the transfer of heat takes place.
- Write the names of any two birds who are expert thermal climbers.
- Where are convection currents used?
- Mention the use of Leslie’s cube
- Define radiation. Write down the factors on which the rate of emission of radiation depends.
- Why are metals good conductors of heat?
- What is meant by gliding?
- What causes the glider to remain in the air?
- Define Thermal conductivity and write its equation.
- Define convection.
- Define land breeze and sea breeze.
- Describe the relation of radiation of heat and surface area.
- Write methods of heat transfer.

## LONG QUESTIONS:

- What measures do you suggest to conserve energy in houses?
- Define radiations and how heat reaches us from the sun.
- Write the use of Leslie Cube. Explain how various surfaces of it can be compared.
- Explain the reasons of sea breeze blows during the day and the land breeze blows during the night.

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