Important questions of thermodynamics- 1. What is the zeroth law of thermodynamics ? How does it lead us to the concept of temperature? 2. Define isothermal and adiabatic process . What are the conditions necessary for such process to occur? 3. State and explain the first law of thermodynamics. Also write its limitations. 4. Define […]
Case study based questions- 1. Total internal reflection – Total internal reflection is the phenomenon of reflection of light into denser medium at the interface of denser medium with rarer medium . For this phenomenon to occur necessary condition is that light must move from denser to rarer and angle of incidence in denser medium […]
Short answer type questions- (2 marks), This assignment provides Very important short answer type questions of ray optics which is very important for the class 12th board examinations. 1.What are the necessary conditions for the phenomenon of total internal reflection to occur . Also write the relation between refractive index and critical angle for a […]
Important questions of thermal properties of matter This assignment provides all important questions of this chapter , which will be important for examinations point of view. 1. Briefly describe the various scale of temperature and give the relation between them. 2.Define coefficient of linear ,area and volume expansion , also find the relation between them. […]
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Thermal stress
Thermal stress- If we clamp the ends of a rod rigidly to prevent its expansion or contraction and then change the temperature, tensile or compressive stress developed is called thermal stress. The rod like to expand or contract but clamps won’t allow it. As shown in fig. To calculate the thermal stress in a clamped […]
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Change of density with temperature
Before to go with tis topic students must know the topic thermal expansion of matter, which is one of the most important topic for thermal properties of matter. To learn the topic Thermal expansion of matter CLICK HERE- After Completing the topic thermal expansion students must solve some important questions of thermal expansion of matter, […]
Before to solve these questions students must studied the topic Thermal expansion of matter , to watch the complete notes on this topic click here Important numericals based on expansion of matter- 1. A surveyor uses a steel measuring tape that is exactly 50m long at a temperature of 200C . What is the length […]
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Thermal expansion
Thermal expansion Most of the material expand when their temperature increases. Then the phenomenon of expansion of material when it is heated is known as thermal expansion. 1. Linear expansion– When a rod heated then the temperature of the body increases due to which length of the rod increases , this phenomenon is known as […]
Temperature is a relative measure of hotness or coldness of a body. An object at a higher temperature is said to be hotter than the one at a lower temperature. The S.I. unit of temperature is Kelvin(K). (We must keep it in our mind that , Heat and temperature are not the same thing , […]
Magnus effect and dynamic lift- The upward force experience by a body when it moves through a fluid is called dynamic lift . Such a lift is felt by airfoil , aircraft win etc. Couse behind it can be explained by Bernoulli’s theorem . It also explain why a spinning ball is deviated from its […]