Punjab 9th Physics Ch 6 Mechanical Properties of Matter Online Test Mcqs

Punjab Physics 9th Class: Chapter 6

Explore the mechanical behavior of materials in Chapter 6: Mechanical Properties of Matter with our Punjab Board 9th Class Physics online resources (New Syllabus 2025-26). This chapter covers elasticity, Hooke’s Law, stress and strain, Young’s modulus, pressure in liquids, atmospheric pressure, Archimedes’ principle, and Pascal’s Law applications. Our New Pattern MCQs Online Test features questions on elastic limits, hydraulic systems, barometers, and pressure calculations. The Short Questions with Answers section explains key concepts like tensile/compressive stress, fluid pressure variations, and practical applications of mechanical properties. Practice regularly to master material science fundamentals and excel in your Punjab Board Physics examinations with strong conceptual understanding.

Punjab 9th Physics Ch 6 Mechanical Properties of Matter Test Online Mcqs (New Syllabus)

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1. Atmospheric pressure is commonly measured using a:

Barometer

Hygrometer

Monometer

Thermometer

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2. Which will exert greater pressure?

A loaded ship of mass 2.2 x 10⁷kg having area 600mm²

A girl of mass 40 kg wearing high heel shoes of cross-sectional area 0.5cm²

4000 kg elephant of total feet area 0.5m²

3 g needle of tip area 1mm²

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3. A mass of 2 kg is hung by spring, which displaces it through 5 cm. the spring constant is:

4N/m

40 N/mm

400N/m

4000N/m

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4. Materials which does not regain its original shape after removal of the load producing deformation are termed as:

Elastic materials

Rigid materials

Plastic materials

Hooke's materials

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5. What is mass of a liquid of density 50 kgm⁻³ in a container of volume 5m³?

200kg

275kg

225kg

250kg

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6. The pressure exerted by a man on the surface of earth will be smaller when he:

Sits on the ground

Stands on both feet

Sleeps on the ground

Stands on one leg

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7. SI unit of pressure is:

Zero

Pascal

Newton

Infinite

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8. Which of the following physical properties is used in a mercury thermometer?

Colour

Volume

Pressure

Electrical resistance

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9. Pressure applied to an enclosed fluid is:

increased in proportional to the mass of fluid and then transmitted to each part of the fluid

diminished and transmitted to the walls of container

increased and applied to every part of the fluid

transmitted unchanged to every portion of the fluid and walls of containing vessel

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10. The most elastic material of the following is:

Steel

Rubber

Wood

Glass

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11. Pressure of liquid in a container increase with:

Depth

Volume

Mass

Base

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12. Hooke's law hold good up to:

Proportional limit

Plastic

Yield limit

Elastic limit

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13. A wire is stretched by a weight w. If the diameter of the wire is reduced to half of its previous value, the extension will become:

four times

one half

one fourth

double

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14. Which amount of water has greater density at room temperature?

1 kg

All have same density

1 ton

100g

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15. The atmospheric pressure will be smaller at:

Peshawar

Murree

Lahore

Islamabad

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16. What is the force exerted by the atmosphere on a rectangular block surface of length 50cm and breadth 40 cm? The atmospheric pressure is 100 kPa.

20kN

100kN

500kN

200kN

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17. Pressure of 1 mm Hg is equal to:

133.29 atm

1 atm

1.316×10⁵atm

1.316×10⁻³atm

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18. Pressure of 1000 m bars is equivalent to:

100kPa

10kPa

1kPa

0.1kPa

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19. Four wires of the same material are stretched by the same load. Their dimensions are given below. Which of them will elongate most?

Length 3m, diameter 3mm

Length 1m, diameter 1mm

Length 4m, diameter 0.5mm

Length 2m, diameter 2mm

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20. The pressure at any point in a liquid is proportional to:

density of liquid

all of the above

acceleration due to gravity

depth of the point below the surface of the liquid

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21. Two metal plates of area 2 and 3 square meters are placed in a liquid at the same depth. The ratio of pressures on the two plates is:

2:3

4:9

√2:√3

1:1

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22. Energy stored in a stretched spring is:

Internal

Potential

Kinetic

Heat

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23. A girl of mass 50 kg wears heels with an area of 2 cm² in contact with the ground. The pressure she exerts on ground is:

4x10⁻⁴Pa

4x10⁻⁵Pa

245x10⁴Pa

4x10⁵Pa

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24. Divers wear special suites in order to protect them from:

Low pressure

Low temperature

High pressure

High temperature

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25. In a stationary fluid, the local pressure of the fluid vary:

Horizontally only

With depth only

Neither with depth nor along horizontal direction

Both with depth and along horizontal direction

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Ch 6 Mechanical Properties of Matter Short Questions