1
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
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
A mass is suspended separately by two different springs in (successive order then time periods is t1 and t2 respectively, If it is connected by both spring as shown in figure then time period is t0 , the correct relation is

AIPMT 2002 Physics - Oscillations Question 25 English
A
$$t_0^2 = t_1^2 + t_2^2$$
B
$$t_0^{ - 2} = t_1^{ - 2} + t_2^{ - 2}$$
C
$$t_0^{ - 1} = t_1^{ - 1} + t_2^{ - 1}$$
D
$${t_0} = {t_1} + {t_2}$$
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