Unit 7 Array Physics 9th Class Punjab MCQ Tests
9th Class Physics Unit 7 MCQ Tests
Unit 7 of 9th Class Physics has 45 questions. If you take an online MCQ test, the system will randomly choose the questions. If you want to take the quiz by chapter then click the start test button.
Total Questions: 45
Total Marks: 45
Time: 45 Mins
Total Questions: 45
Total Marks: 45
Time: 45 Mins
45Min : 00 Sec Remaining
Question # 1
For which of the following conditions, the body will sink if \'W\' is the weight of the body and \'F\' is the buoyant force?
The principle of floatation states that when an object floats in a liquid, the buoyant force/upthrust that acts on the object is equal to the weight of the object.
Question # 2
What are the dimensions of stress?
Question # 3
Two light balls are suspended, as shown in image. When a stream of air passes through the space between them, what happens to the distance between the balls?
Question # 4
Which of the following is the reason for not overfilling the brake reservoir?
Question # 5
Why does atmospheric pressure decreases with height?
Question # 6
Why does a piece of stone sink in water but a ship with a huge weight floats?
The scenerio described in the statement is according to the Archimedes principle.
Question # 7
What is the strain of a wire that is 2.5 m long and of cross sectional area 10 − 5 m 2 , if it is stretched 1.5 mm by a force of 100 N in the elastic region?
Question # 8
From the following, the lightest substance is
Question # 9
A customer complains that the brake pedal is lower than normal. Which of the following can be the fault?
Question # 10
Which one of the following types of weather is usually associated with low pressure?
Question # 11
A concrete slab weighs 200 N. Its apparent weight is 120 N when it is fully submerged under sea. What is the density of sea water if the volume of sea water displaced by the concrete slab is 5000 cm3? The value of g is 10 m s − 2
Question # 12
What type of substance does Pascal\'s principle deal with?
Question # 13
What would be the buoyant force of water on a block of wood, if the volume of block is 850 c m 3 and the block is floating on water?
Question # 14
A floating object displaces a fluid having weight equal to the weight of the object as per the
Question # 15
What are the characteristics of gases?
Question # 16
What is the magnitude of force required to stretch a 15 cm long spring, with a spring constant of 98 N m − 1 , to a length of 16 cm?
Question # 17
In which of the following locations, the atmospheric pressure is greatest?
Question # 18
According to the kinetic molecular theory, which of the following statements describes a gas?
Question # 19
Mass per unit volume is called
Question # 20
Why is steel more elastic than the rubber?
Question # 21
What is the SI unit of stress?
The unit of force F is N , whereas the units of area A are m2.
Question # 22
In automobile braking system, what are the retarders?
Question # 23
Atmospheric pressure acts in which direction?
Question # 24
Which of the following best describes why the rear brakes tend to lock up before the front brakes during hard braking?
Question # 25
A machine which works on Pascal law is known as
Question # 26
In which of the following locations, the atmospheric pressure is greatest?
Question # 27
Plasma consists of
Question # 28
What is the force required to double the length of a wire of unit area of cross-section having young\'s modulus of elasticity Y?
Question # 29
Which of the following statements is correct about plasma?
Question # 30
The weight of a piece of metal is 9.25 kg in air and 8.20 kg in water. What is the density of metal?
Question # 31
What are the applications of Archimedes principle?
Archimedes principle states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
Question # 32
As the depth of sensor varies the liquid pressure
Question # 33
What is the magnitude of force required to stretch two springs of constants k 1 = 98 N m − 1 and k 2 = 120 N m − 1 by 8 cm, if they are in parallel to each other?
Question # 34
What volume of brass of density 8.5 g c m − 3 must be attached to a piece of wood of mass 100 g and density 0.2 g c m − 3 so that the two together will just submerge beneath water?
Question # 35
An increasing atmospheric pressure with a decline later on predicts an
Question # 36
Stone, metal spoon, pencil are the examples of
Question # 37
Why balloon floats in air?
Balloons fly in air due to buoyant force and these are filled with light gases like helium or hot air.
Question # 38
A steel wire is loaded by a 2 kg mass. If the radius of wire is doubled, what will be its extension?
Question # 39
The modulus of elasticity of a material does not depend on which of the following factors?
Temperature also has an effect on the elasticity of a material, as the elasticity increases with the decrease in temperature and vice versa.
Question # 40
What is the most common form of matter in the universe but the least common on Earth?
Question # 41
A block of wood with dimensions 0.45 x 0.11 x 0.23 m 3 is floating along a river with the most broad face at the lower side. What is the mass of this piece of wood if it is submerged to a height of 0.125 m?
Question # 42
A ball of mass 2 kg that has a diameter of 50 cm, falls in the pool. What is the volume of water displaced?
Question # 43
A boat of 8 metre and 40 metre long floats on water. If 125000 N of cargo is added, it will sink
Question # 44
As compared to water, mercury is denser
Question # 45
According to kinetic molecular theory, what is the cause that gases exert pressure on the walls of container?
Total Questions
123456789101112131415161718192021222324252627282930313233343536373839404142434445
Question # 1
For which of the following conditions, the body will sink if \'W\' is the weight of the body and \'F\' is the buoyant force?
The principle of floatation states that when an object floats in a liquid, the buoyant force/upthrust that acts on the object is equal to the weight of the object.
Question # 2
What are the dimensions of stress?
Question # 3
Two light balls are suspended, as shown in image. When a stream of air passes through the space between them, what happens to the distance between the balls?
Question # 4
Which of the following is the reason for not overfilling the brake reservoir?
Question # 5
Why does atmospheric pressure decreases with height?
Question # 6
Why does a piece of stone sink in water but a ship with a huge weight floats?
The scenerio described in the statement is according to the Archimedes principle.
Question # 7
What is the strain of a wire that is 2.5 m long and of cross sectional area 10 − 5 m 2 , if it is stretched 1.5 mm by a force of 100 N in the elastic region?
Question # 8
From the following, the lightest substance is
Question # 9
A customer complains that the brake pedal is lower than normal. Which of the following can be the fault?
Question # 10
Which one of the following types of weather is usually associated with low pressure?
Question # 11
A concrete slab weighs 200 N. Its apparent weight is 120 N when it is fully submerged under sea. What is the density of sea water if the volume of sea water displaced by the concrete slab is 5000 cm3? The value of g is 10 m s − 2
Question # 12
What type of substance does Pascal\'s principle deal with?
Question # 13
What would be the buoyant force of water on a block of wood, if the volume of block is 850 c m 3 and the block is floating on water?
Question # 14
A floating object displaces a fluid having weight equal to the weight of the object as per the
Question # 15
What are the characteristics of gases?
Question # 16
What is the magnitude of force required to stretch a 15 cm long spring, with a spring constant of 98 N m − 1 , to a length of 16 cm?
Question # 17
In which of the following locations, the atmospheric pressure is greatest?
Question # 18
According to the kinetic molecular theory, which of the following statements describes a gas?
Question # 19
Mass per unit volume is called
Question # 20
Why is steel more elastic than the rubber?
Question # 21
What is the SI unit of stress?
The unit of force F is N , whereas the units of area A are m2.
Question # 22
In automobile braking system, what are the retarders?
Question # 23
Atmospheric pressure acts in which direction?
Question # 24
Which of the following best describes why the rear brakes tend to lock up before the front brakes during hard braking?
Question # 25
A machine which works on Pascal law is known as
Question # 26
In which of the following locations, the atmospheric pressure is greatest?
Question # 27
Plasma consists of
Question # 28
What is the force required to double the length of a wire of unit area of cross-section having young\'s modulus of elasticity Y?
Question # 29
Which of the following statements is correct about plasma?
Question # 30
The weight of a piece of metal is 9.25 kg in air and 8.20 kg in water. What is the density of metal?
Question # 31
What are the applications of Archimedes principle?
Archimedes principle states that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
Question # 32
As the depth of sensor varies the liquid pressure
Question # 33
What is the magnitude of force required to stretch two springs of constants k 1 = 98 N m − 1 and k 2 = 120 N m − 1 by 8 cm, if they are in parallel to each other?
Question # 34
What volume of brass of density 8.5 g c m − 3 must be attached to a piece of wood of mass 100 g and density 0.2 g c m − 3 so that the two together will just submerge beneath water?
Question # 35
An increasing atmospheric pressure with a decline later on predicts an
Question # 36
Stone, metal spoon, pencil are the examples of
Question # 37
Why balloon floats in air?
Balloons fly in air due to buoyant force and these are filled with light gases like helium or hot air.
Question # 38
A steel wire is loaded by a 2 kg mass. If the radius of wire is doubled, what will be its extension?
Question # 39
The modulus of elasticity of a material does not depend on which of the following factors?
Temperature also has an effect on the elasticity of a material, as the elasticity increases with the decrease in temperature and vice versa.
Question # 40
What is the most common form of matter in the universe but the least common on Earth?
Question # 41
A block of wood with dimensions 0.45 x 0.11 x 0.23 m 3 is floating along a river with the most broad face at the lower side. What is the mass of this piece of wood if it is submerged to a height of 0.125 m?
Question # 42
A ball of mass 2 kg that has a diameter of 50 cm, falls in the pool. What is the volume of water displaced?
Question # 43
A boat of 8 metre and 40 metre long floats on water. If 125000 N of cargo is added, it will sink
Question # 44
As compared to water, mercury is denser
Question # 45
According to kinetic molecular theory, what is the cause that gases exert pressure on the walls of container?
Total Questions
123456789101112131415161718192021222324252627282930313233343536373839404142434445
Physics MCQ Test by Topics
- +7.1 Kinetic Molecular Model of Matter
- +7.1 Solids
- +7.1 Liquids
- +7.1 Gases
- +7.1 Plasma- The Fourth State of Matter
- +7.2 Density
- +7.3 Pressure
- +7.4 Atmospheric Pressure
- +7.4 Experiment
- +7.4 Measuring Atmospheric Pressure
- +7.4 Variation in Atmospheric Pressure
- +7.5 Pressure in Liquids
- +7.5 Pascals Law
- +7.5 Applications of Pascals Law
- +7.5 Hydraulic Press
- +7.5 Braking System in Vehicles
- +7.6 Archimedes Principle
- +7.6 Density of an Object
- +7.7 Principal of Floatation
- +7.7 Ships and Submarines
- +7.8 Elasticity
- +7.8 Stress
- +7.8 Strain
- +7.9 Hooks Law
- +7.9 Youngs Modulus
Physics
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Updated on: 17-05-2026
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