PPSC Physics Chapter 2 Structural Properties of Matter With Answers

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PPSC Physics Chapter 2 Structural Properties of Matter

Sr. # Questions Answers Choice
1 A boat loving at constant speed 'v' through still water experiences a total frictional drag F what is the power developed by the boat. 1/2 Fv Fv 1/2 Fv2 Fv2
2 Bernoulli's equation is Applica table to points In a steady flowing liquid In a streamline In a straight line perpendicular to steamline In any non viscous liquid
3 If the cross sectional area of the pipe decreases the speed of the fluid increase according to. Venturi relation Bernoulli's equation Equation of continuity Torriculli's theroem
4 Bernouli's equation includes as a special case of. Hook's law Torricelli's therorem Third law of motion Archimedes principle
5 When a tennis balls is hit by a racket inasmuch a way that it spins as well as moves forward the velocity of the air on one side of the ball Increases Decreases Remain constant Become zero
6 The air pressure at the bottom of an air foiling motion is Greater than that on the top<div><br></div> Equal to that on the top Grather than that on the top Zero
7 A uniform vertical wire is stretched by hanging a mass from its lower end Which of the following does ot effect the strain in the wire. The stress The upstretched length The load applied the Young's modulus of the metal
8 A force of 10 N acting on a certain spring produces an extension of 40 mm Two such spring are connected end to end and this double length spring is extended by 40 mm What is the strain energy. 0.05 J 0.10 J 0.20 J 0.40 J
9 If a fluid does not wet a liquid surface, the angle of contact is. 90<sup> o</sup> less than 90 <sup>o</sup> * greater than 180 <sup>o</sup> between 90<sup> o</sup> and 180 <sup>o</sup>
10 Viscosity of fluids with rise in temperature. Increases Decreases Remains constant Vanishes
11 The Pressure will be low where the speed of the fluid is Zero High Low Constant
12 If each particle of the fluid passing through a point follows the same path then flow is said to be Regular flow Irregualr flow Turbulent flow Streamline flow
13 The terminal velocity in case of spherical droplet is directly proportional to. Square of the radius of the droplet Radius of the droplet Cube of the radius of the droplet Half of the Radius of the droplet half
14 The dimensions of viscosity are [MLT-1] [MT-2] [ML-1T-1] [ML2T-1]
15 The SI unit of viscosity is. Kg m -1 s-2 kg m-1 s-1 kg ms=-1 kg m s-2
16 With increase in temperature the angle of contact of liquid. Increases Decreases Becomes zero First increase then decreases
17 Minor losses through values, fittings, bends etc are modeled as proportional to Velocity head Static head total head Pressure drop
18 Which principle is in effect when a ship displaces ocean water. Bernouli's Pascal's Hook's Archimedes
19 The design of an airfoil uses Archimedes principle Bernouli's principle Pascal law Hooke's law
20 A fluid is said to be ideal if it is Non viscous Non viscous and incompressible Non viscous and with steady flow Non viscous incompressible and has steady flow
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