THERMAL PHYSICS QUIZ-5
Dear Readers,As per analysis for previous years, it has been observed that students preparing for NEET find Physics out of all the sections to be complex to handle and the majority of them are not able to comprehend the reason behind it. This problem arises especially because these aspirants appearing for the examination are more inclined to have a keen interest in Biology due to their medical background.
Furthermore, sections such as Physics are dominantly based on theories, laws, numerical in comparison to a section of Biology which is more of fact-based, life sciences, and includes substantial explanations. By using the table given below, you easily and directly access to the topics and respective links of MCQs. Moreover, to make learning smooth and efficient, all the questions come with their supportive solutions to make utilization of time even more productive. Students will be covered for all their studies as the topics are available from basics to even the most advanced.
Q1. For proper ventilation of building ,windows must be oe near the bottom and top of the walls so as to let pass
Solution
Density of hot air is lesser than the density of cold air so hot air rises up
Density of hot air is lesser than the density of cold air so hot air rises up
Q2.Two thermometers A and B are exposed in sun light. The valve of A is pointed black, but that of B is not pointed. The correct statement regarding this case is
Solution
As for a black body rate of absorption of heat is more.Hence thermometer A shows faster rise in temperature but finally both will acquire the atmosphere temperature
As for a black body rate of absorption of heat is more.Hence thermometer A shows faster rise in temperature but finally both will acquire the atmosphere temperature
Q3. A piece of glass is heated to a high temperature and then allowed to cool. If it cracks, a probable reason for this is the following property of glass
Solution
When a piece of glass is heated ,due to low thermal conductivityit does not conduct heat fast .Hence unequal expansion of it's layers crack the glass.
When a piece of glass is heated ,due to low thermal conductivityit does not conduct heat fast .Hence unequal expansion of it's layers crack the glass.
Q4. When two ends of a rod wrapped with cotton are maintained at different temperatures and after same time every point of the rod attains a constant temperature, then
Solution
Because steady state has been reached.
Because steady state has been reached.
Q5.A body radiates energy 5W at a temperature of 127℃. If the temperature is increased to 927℃,then it radiates energy at the rate of
Solution
Q6. In a radiation spectrum obtained from a furnace of 2600 K has maximum intensity at 12000 Å wavelength. If the maximum intensity in spectrum of a star is at 5000 A. the temperature of the outer surface of star is
Solution
Q7.47. How much heat energy is gained when 5 kg of water at 20℃ is brought to its boiling point
(specific heat of water =4.2 kJ kg-1c-1)
Solution
Q8.The point on the pressure-temperature phase diagram where all the three phases co-exist is called
Solution
Q9.Distrubution of energy in the spectrum of a black body can be correctly represented by
Solution
Because planck's law explains the distrubution of energy correctly at low temperature as well as at hih temperature
Because planck's law explains the distrubution of energy correctly at low temperature as well as at hih temperature
Q10. 4200j of work is required for
Solution
