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1.
A conductor of area of cross-section 100
and length 1 cm has coefficient of thermal conductivity 0.76
. If 30 cal of heat flows through the conductor per second. Find the temperature difference across the conductor.
and length 1 cm has coefficient of thermal conductivity 0.76. If 30 cal of heat flows through the conductor per second. Find the temperature difference across the conductor.
2.
According to the experiment of Ingen Hausz the relation between the thermal conductivity of a metal rod is 
and the length of the rod whenever the wax melts is
and the length of the rod whenever the wax melts is
3.
Dry ice is
4.
The latent heat of vaporization of a substance is always
5.
Pick out the statement which is not true
6.
By increasing the temperature of a liquid its
7.
The spectrum of a black body at two temperatures 
and 
is shown in the figure. Let 
and 
be the areas under the two curves respectively. The value of 
is
and is shown in the figure. Let and be the areas under the two curves respectively. The value of is
8.
A metallic solid sphere is routing about its diameter as axis of rotation. If the temperature is increased by 200
, the percentage in its moment of inertia is (Coefficient of linear expansion of the metal=
)
, the percentage in its moment of inertia is (Coefficient of linear expansion of the metal= )
9.
Three discs, 
and 
having radii 2 m, 4 m and 6 m respectively are coated with carbon black on their outer surface. The wavelengths corresponding to maximum intensitios are300 nm, 400 nm and 500 nm respectively. The power radiated by them are 
and 
respectively
and having radii 2 m, 4 m and 6 m respectively are coated with carbon black on their outer surface. The wavelengths corresponding to maximum intensitios are300 nm, 400 nm respectively10.
Which of the following has maximum specific heat