All India Engineering / Architecture Entrance Examination (AIEEE)
CBSE Guess > AIEEE > AIEEE Papers > 2007 > Physics
AIEEE 2007 Physics
Q. 24. One end of a thermally insulated rod is kept at a temperature
and the other at 
. The rod is composed of two sections of lengths 
and 
and thermal conductivities 
and 
respectively. The temperature at the interface of the sections is
Sol: 
Correct choice: (3)
Q. 25. A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of
- 1000
- 10000
- 10
- 100
Sol: 
Correct choice: (4)
Q. 26. If 
denote the specific heats of nitrogen per unit mass at constant pressure and constant volume respectively, then
Sol: 
are molar specific heat capacitates. For unit mass if specific heat capacities are
Correct choice: (1)