×
Detail Form
We will send your result on your email id and phone no. please fill detail
1.
During constant temperature, we feel colder on a day when the relative humidity will be
2.
"Good emitters are good absorbers" is a statement concluded from
3.
Water has maximum density at
4.
Two rods 
and 
have equal lengths. Their thermal conductivities are 
and cross sectional areas are 
When the temperature at ends of each rod are 
respectively, the rate of flow of heat through 
will be equal, if
and have equal lengths. Their thermal conductivities are and cross sectional areas are When the temperature at ends of each rod are respectively, the rate of flow of heat through will be equal, if
5.
Amount of heat required to raise the temperature of a body through 
is called its
is called its
6.
A lead ball moving with a velocity 
strikes a wall and stops. If 50% of its energy is converted into heat, then what will be the increase in temperature (Specific heat of lead is 
)
strikes a wall and stops. If 50% of its energy is converted into heat, then what will be the increase in temperature (Specific heat of lead is )
7.
A body takes 
to cool from 
to 
. If the temperature of the surroundings is 
, the time taken by it to cool from to 
will be
to cool from to . If the temperature of the surroundings is , the time taken by it to cool from to will be
8.
An ice box made of Styrofoam (Thermal conductivity=0.01
) is used to keep liquids cool. It has a total wall area including lid of 0.8
and wall thickness of 0.2 cm. A bottle of water is placed in the box and filled with ice. If the outside temperature is 30
the rate flow of heat into the box is (in 
)
) is used to keep liquids cool. It has a total wall area including lid of 0.8 and wall thickness of 0.2 cm. A bottle of water is placed in the box and filled with ice. If the outside temperature is 30 the rate flow of heat into the box is (in )
9.
Two rods of same length and material transfer a given amount of heat in 12 s, when they are joined end to end (
, in series). But when they are joined in parallel, they will transfer same heat under same conditions in
, in series). But when they are joined in parallel, they will transfer same heat under same conditions in
10.
Which one of the following is 
graph for perfectly black body? 
is the frequency of radiation with maximum intensity, 
is the absolute temperature.
graph for perfectly black body? is the frequency of radiation with maximum intensity, is the absolute temperature.