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. Energy stored in a stretched spring is:

Kinetic

Internal

Heat

Potential

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2. 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

2:3

1:1

4:9

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

Length 4m, diameter 0.5mm

Length 2m, diameter 2mm

Length 1m, diameter 1mm

Length 3m, diameter 3mm

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4. 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:

one half

one fourth

double

four times

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

Stands on both feet

Sleeps on the ground

Stands on one leg

Sits on the ground

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

1 kg

100g

All have same density

1 ton

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

acceleration due to gravity

depth of the point below the surface of the liquid

density of liquid

all of the above

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

Both with depth and along horizontal direction

Horizontally only

With depth only

Neither with depth nor along horizontal direction

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

Elastic materials

Hooke's materials

Plastic materials

Rigid materials

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10. 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

4x10⁵Pa

4x10⁻⁵Pa

245x10⁴Pa

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11. Pressure applied to an enclosed fluid is:

increased and applied to every part of the fluid

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

diminished and transmitted to the walls of container

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

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12. The atmospheric pressure will be smaller at:

Peshawar

Lahore

Islamabad

Murree

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13. Atmospheric pressure is commonly measured using a:

Monometer

Thermometer

Barometer

Hygrometer

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14. The most elastic material of the following is:

Steel

Glass

Rubber

Wood

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15. Which will exert greater pressure?

4000 kg elephant of total feet area 0.5m²

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

3 g needle of tip area 1mm²

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

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

Low pressure

High temperature

Low temperature

High pressure

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17. 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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18. Pressure of 1 mm Hg is equal to:

133.29 atm

1.316×10⁻³atm

1 atm

1.316×10⁵atm

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19. SI unit of pressure is:

Pascal

Infinite

Zero

Newton

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

200kg

250kg

275kg

225kg

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

4N/m

4000N/m

40 N/mm

400N/m

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22. Pressure of 1000 m bars is equivalent to:

100kPa

0.1kPa

1kPa

10kPa

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

Electrical resistance

Pressure

Volume

Colour

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24. Pressure of liquid in a container increase with:

Mass

Volume

Depth

Base

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25. Hooke's law hold good up to:

Yield limit

Elastic limit

Proportional limit

Plastic

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Ch 6 Mechanical Properties of Matter Short Questions