PPSC Physics Full Book With Answers

image
image
image

PPSC Physics Full Book

Sr. # Questions Answers Choice
1 The internal inertia of a thermodynamics system is known as. Enthalpy Entropy Isotherm Adiabatic
2 A sample of an ideal gas may i) energy adiabatically, or ii) Expand isothermally. the net flow of heat into the gas from the exterior is. Positive is each case Negative for i) and positive for ii) Zero for i) and positive for ii) Positive for i) and negative for ii)
3 The mechanical equivalent of heat is. Physical quantity Constant Conversion factor Zero
4 Which quantity is common for systems in thermal equilibrium. Heat Temperature Momentum Specific heat
5 The temperature which is the same in oC and oF is. -20 -40 20 40
6 What happens to internal energy of a piece of lead when hammered. Increases Decreases Remains unchanged Becomes zero
7 The internal energy of an isolated system Is zero Keeps on changing Remains constant Cannot be judged
8 What is the necessary condition for Boyle's law to hold good. Isothermal Adiabatic Isobaric Isochoric
9 Which of the following has maximum specific heat. Glass Iron Brass Lead
10 For which process is the relation Delta Q = Delta V true. Isothermal Adiabatic isobaric Isochoric
11 In free expansion of a gas. the internal energy of the system. Increases Descreases Remain unchanged Becomes infinite
12 In onw cycle of a steam engine there are how many dead centres. 1 2 3 zero
13 Change in which parameter determines the work done by a gas during adiabatic prcoess. volume Pressure Temperature Weight
14 In which given process does the system always return to the original thermodynamic state. Cyclic Adiabatic isothermal Isobaric
15 The kinetic molecular model of matter describe matter an being made up of molecules in continuous. Vibratory motion Random motion rotatory motion Linear motion
16 A mercury in glass thermometer and thermocouple thermometer are both calibrated using the same fixed point of 0 oC and 100 oc when both temperature are used to measure the temperature of a body the temperature measured on both thermometers will be exactly the same For all temperatures between 0 oC and 100 o C only Only are the fixed points For all temperatures at all times When converted to the Kelvin scale
17 Which of the following thermometers is the most suitable for measuring rapidly varying temperature. Thermocouple thermometer Mercury in glass thermometer Alcohol in glass thermometer Platinum resistance thermometer
18 An immersion heater rated at 150 W is fitted into a large block of ice at 0 oC. The specific latent heat of fusionism 300 J g-1. How long does it take to melt 10 g of ice. 5 s 10 s 15 s 20 s
19 Which of the following measures how quickly the thermometer liquid mainly because it Is coloriess Is a bad conductor of heat Does not expand linearly Has a low boiling point
20 Which of the following in the best container for gas during adiabatic process. Copper vessel Thermos flask Glass container Wooden container
21 A Carnot engine can be 100% efficient of the sink is at. 0 k 0 oF 0 oC 273 K
22 When a liquid is hated retaining its liquid sate then its molecules gain. K.E. P.E Heat energy Chemical energy
23 To which law of thermodynamics, the concept of temperature is related to. Zeroth law First law Second law Third law
24 The specific heat of an ideal gas values as To T1 T2 T3
25 On which parameter, the heat capacity of a material depends upon. Density of the material Specific heat of the material Temperature of the material Structure of the material
26 What is the minimum number of thermodynamic parameters required to specify the state of gas system. 1 2 3 Infinite
27 In a vacuum flask the vacuum prevents heat transfer by Radiation only Conduction only Convection only Conduction and convection
28 Woolen clothing a effective in keeping us warm because. An trapped int he wool acts as an insulator Heat loss by convection and radiation is prevented Wool is bad traciator and good absorber of heat Wool can retain high temperatures
29 A convention current is the movement of fluid caused by the change in. Pressure Temperature Densities Volume
30 Convention is the transfer of thermal energy by means of currents in Pressure Temperature Liquids Fluids
Download This Set

Is this page helpful?

×