Physics questions
20027 published questions with worked solutions.
- System A is in thermal equilibrium with B and B is separately in thermal equilibrium with C. Then A and C are in thermal...
- Which of the following is not a thermodynamical function?
- Which of the following laws of thermodynamics leads to the inference that it is difficult to convert whole of heat into work?
- In a thermodynamic system, working substance is an ideal gas. Its internal energy is in the form of
- First law of thermodynamics is given by
- Athermanous bodies are those
- Substances which transmit heat radiations are called
- The coefficient of absorption of the thermal radiation of body is
- Which of the following surfaces will radiate maximum heat?
- Perfectly black body appears black in colour because
- Which of the following is the example of ideal black body?
- The best ideal black body is
- Which of the following is NOT the property of black body radiations?
- The coefficient of absorption of perfectly black body is
- Lamp black absorbs radiant heat which is near about
- A star radiates maximum energy of wavelength _m at temperature T. What will be the temperature of another star which radiates...
- The S.I. units of the constant in Wein's displacement law are
- We do not use spectrometer of visible light to study the spectral distribution of radiation of blackbody because
- On investigation of light from three different stars A, B and C, it was found that in the spectrum of A, the intensity of red...
- The spectrum of black body radiation is a