Physics questions
20027 published questions with worked solutions.
- Thermos flask prevents heat loss by
- Two persons ordered tea in a restaurant and waited for a friend to arrive. The first person mixed hot tea and cold milk in the...
- Heat radiation have wavelengths in the region of
- On which one of the factors do the nature of the thermal radiation depends inside an enclosure?
- Under steady state, the temperature of a body
- It is hotter at the same distance over the top of a fire than it is on the side of it mainly because: [CPMT 1980]
- Sun's heat reaches us by: [CPMT 1994]
- Heat is transmitted from higher to lower temperature through actual mass motion of the molecules in : [AFMC 1994]
- The velocity of heat radiation in vacuum is :
- Heat is transmitted from higher to lower temperature through molecular collision in :
- The slowest mode of transfer of heat is
- The colour of a star is an indication of its
- If the temperature of the sun increases by 100%, the maximum energy radiated by the sun would correspond to
- A medium is not required for transfer of thermal energy from one body to another body in
- If thermal radiation passes through free space then the temperature of the free space
- Thermal radiations may exhibit the following phenomenon
- The door of refrigerator in a room is left open the room is
- Mode of transmission of heat, in which heat is carried by the moving particles, is
- In which of the following process, convection does not take place primarily:
- A hot and a cold body are kept in vacuum separated from each other. Which of the following cause decrease in temperature of the...