Electricity
Current Electricity
MCQ (Single Correct Answer)
Moving Charges and Magnetism
MCQ (Single Correct Answer)
Magnetism and Matter
MCQ (Single Correct Answer)
Electromagnetic Induction
MCQ (Single Correct Answer)
Electromagnetic Waves
MCQ (Single Correct Answer)
Modern Physics
Semiconductor Electronics
MCQ (Single Correct Answer)
1
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.
2
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Consider two rods of same length and different specific heats (S1, S2), conductivities (K1, K2) and area of cross-sections (A1, A2) and both having temperatures T1 and T2 at their ends. If rate of loss of heat due to conduction is equal, then
A
K1A1 = K2A2
B
$${{{K_1}{A_1}} \over {{S_1}}} = {{{K_2}{A_2}} \over {{S_2}}}$$
C
K2A1 = K1A2
D
$${{{K_2}{A_1}} \over {{S_2}}} = {{{K_1}{A_2}} \over {{S_1}}}$$
3
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
4
AIPMT 2002
MCQ (Single Correct Answer)
+4
-1
Unit of Stefan's constant is
A
watt m2 K4
B
watt m2/K4
C
watt/m2 K
D
watt/m2K4
NEET Subjects