StudentAidUnit 6: Mechanical Properties of Matter — Mcqs
9th Class Physics · Unit 6: Mechanical Properties of Matter
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Multiple Choice Questions (Exercise)
1.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:
2.Four wires of the same material are stretched by the same load. Their dimensions are given below. Which of them will elongate most?
3.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:
4.The pressure at any point in a liquid is proportional to:
5.Pressure applied to an enclosed fluid is:
6.The principle of a hydraulic press is based on:
7.When a spring in compressed, what form of energy does it possess?
8.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.
SLO based Additional MCQs
Elastic Behavior of Material
1.The most elastic material of the following is:
Hooke's Law
2.Hooke's law hold good up to:
- a Proportional unit
- b Yield limit
- c Elastic limit
- d Plastic
Spring Constant
3.A mass of 2 kg is hung by spring, which displaces it through 5 cm. the spring constant is:
- a 400 N/m
- b 40 N/m
- c 4 N/m
- d 4000 N/m
Deforming of Material
4.Materials which does not regain its original shape after removal of the load producing deformation are termed as:
Pressure
5.SI unit of pressure is:
6.Which will exert greater pressure?
- a 3 g needle of tip area 1mm²
- b 4000 kg elephant of total feed area 0.5 m²
- c A girl of mass 40 kg wearing high heel shoes of cross-sectional area 0.5 cm²
- d A loaded ship of mass 2.2 x 10^7 kg having area 600mm²
7.Pressure of 1000 m bars is equivalent to:
8.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:
- a 4 x 10^-5 Pa
- b 245 x 10^4 Pa
- c 4 x 10^-4 Pa
- d 4 x 10^5 Pa
9.Divers wear special suites in order to protect them from:
10.In a stationary fluid, the local pressure of the fluid vary:
Atmospheric Pressure
11.The pressure exerted by a man on the surface of earth will be smaller when he:
12.Pressure of 1 mm Hg is equal to:
13.Atmospheric pressure is commonly measured using a:
14.The atmospheric pressure will be smaller at:
Pressure in Liquid
15.Pressure of liquid in a container increase with:
Density
16.Which amount of water has greater density at room temperature?
- a 100g
- b 1 kg
- c 1 ton
- d All have same density
17.What is mass of a liquid of density 50 kg m^-3 in a container of volume 5m³?
Mercury Barometer
18.Which of the following physical properties is used in a mercury thermometer?