1
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
For a black body at temperature 727oC, its radiating power is 60 watt and temperature of surrounding is 227oC. If temperature of black body is changed to 1227oC then its radiating power will be
A
304 W
B
320 W
C
240 W
D
120 W
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Which of the following is best close to an ideal black body?
A
black lamp
B
cavity maintained at constant temperature
C
platinium black
D
a lump of charcoal heated to high temperature.
3
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
The Wien's displacement law express relation between
A
wavelength corresponding to maximum energy and temperature
B
radiation energy and wavelength
C
temperature and wavelength
D
colour of light and temperature.
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
The efficiency of Carnot engine is 50% and temperature of sink is 500 K. If temperature of source is kept constant and its efficiency raised to 60%, then the required temperature of sink will be
A
100 K
B
600 K
C
400 K
D
500 K
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