Answer to Question #7722 in Electric Circuits for sulaimon lateef

Question

1Which of the following helps to determine whether a body will be in thermal equilibrium with another body? thermal energy zeroth law of thermodynamics numerical scale first law of thermal thermodynamics 2A thermocouple works on the principle of -------------------- variation of e.m.f with temperature variation of volume with temperature variation of pressure with temperature variation of resistance with temperature 3The fundamental interval of a thermometric scale refers to --------------------- triple point of water difference between upper and lower fixed points ratio of the upper to the lower fixed point temperature of steam at standard atmospheric pressure 4The ice and steam points on a thermometer correspond to X and 50mm respectively. A temperature of 60degree celcius corresponds to 52mm on the thermometer. Calculate the value of X 4 mm 8 mm 10 mm 20 mm 5A railway line is laid with 10m length of rail on a day when the temperature is 2:50oC . There is a gap of 0.5cm between the rails. Find the temperature at which the gap will close. 27:00oC 32:50oC 41:70oC 44:20oC 6In an experiment involing an ideal gas the pressure (P) of the gas is plotted against the reciprocal of the volume ( 1/V ) of the gas at constant temperature. The graph is------------ a straight line with negative slope and intercepts on both axes a straight line with a positive slope and passes through the origin a curve which is asymptotic to both axes a parabolic curve 7A platinium resistance thermometer has resistance of 52.5 ohms and 9.75 ohms at 0 degrees celcius and 100 degrees celcius respectively. When the resistance is 8.25 ohms, find the temperature 63:6oC 66:7oC 75:0oC 84:6oC 8The choice of thermometric liquids in a thermometer should depend on the following properties except: must be opaque must have a low melting point must have a high specific heat capacity must have a high coefficient of expansion 9A square plate of side 10 cm is made of a metal of linear expansivity 2Â10À5 /K. As the plate is heated from 30o C to 100o , the area of one face of the plate will increase to ------------- 105:6cm2 104:2cm2 102:8cm2 101:4cm2 10The equation PaVbTc=constant reduce to Boyle’s law if a=1,b=0,c=0 a=1,b=1,c=0 a=0,b=0,c=1 a=1,b=1,c=1 11The product of pressure (P) and volume (V) has the dimension or unit of --------------------------- force power impulse work 12The S.I unit of heat capacity is ------------------- joules joule per kilogramme joule per Kelvin kilogramme per joule 13The process by which a substance changes directly from solid state to gaseous state at any temperature is called Van der Waals process sublimation Newton’s law of cooling evaporation 14A gas occupies a certain volume at 27 degree celcius.If it is heated at constant pressure, its volume is exactly doubled at a temperature of ---------------------- 54 degrees celcius 219 degrees celcius 327 degrees celcius 600 degree celcius 15If the specific heat capacity of water initially is 4:2Â103 per kg per K and g=10m=s2 , the difference in temperature of water between the top and bottom of a 210 m high water fall is ---------- 0:05oC 0:5oC 1:0oC 4:2oC 16A person suffers a more severe burn from steam than from boiling water because ------------------- steam is at higher temperature than boiling water steam spreads more easily over the skin than boiling water steam penetrates more deeply into the skin than boiling water steam possesses greater heat energy per unit mass than boiling water at the same temperature 17A change of state is often accompanied by a change in (I) temperature (II) density (III) internal energy (IV) mass. Which of these is correct? I and II II and III III and IV I and IV 18When the pressure of the vapour on top of an enclosed liquid is equal to the pressure of the atmosphere, the liquid is at its --------- boiling point dew point freezing point melting point 19One of these is NOT a factor that can affect the rate of evaporation temperature pressure volume of liquid air dryness 20The Van der Waals equation for real gases is given as p+av2=RT (p+aV2)b=RT (PÀaV2)b=RT (P+aV2)(VÀb)=RT

Answer 1

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