Question Answers
Sahay Sir > Question Answers
One end of a copper rod of uniform cross-section and of length 3.1 m is kept in contact with ice and the other end with water at 100 C. At what point along its length should a temperature
25
Oct
One end of a copper rod of uniform cross-section and of length 3.1 m is kept in contact with ice and the other end with water at 100 C. At what point along its length should a temperature One end of a copper rod of uniform cross-section and of length 3.1 m is kept in [...]
Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K1, K2, K3, K4 and K5. When points A and B are maintained at different temperatures.
25
Oct
Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K1, K2, K3, K4 and K5. When points A and B are maintained at different temperatures. Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K1 k2 K3 K4 and K5. When [...]
An ice box used form keeping eatables cold has a total wall area of 1 m^2 and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 Joule/metre C.
25
Oct
An ice box used form keeping eatables cold has a total wall area of 1 m^2 and a wall thickness of 5.0 cm. The thermal conductivity of the ice box is K = 0.01 Joule/metre C. An ice box used form keeping eatables cold has a total wall area of 1 m^2 and a wall [...]
One end of a copper rod of length 1.0 m and cross-sectional area 10^-3 m^2 is immersed in boiling water and the other end in ice. If the coefficient of thermal conductivity of copper
25
Oct
One end of a copper rod of length 1.0 m and cross-sectional area 10^-3 m^2 is immersed in boiling water and the other end in ice. If the coefficient of thermal conductivity of copper One end of a copper rod of length 1.0 m and cross-sectional area 10^-3 m^2 is immersed in boiling water and [...]
A cylindrical rod with one end in a steam chamber and the other end in ice results in melting of 0.1 g of ice per second. If the rod is replaced by another with half the length and
25
Oct
A cylindrical rod with one end in a steam chamber and the other end in ice results in melting of 0.1 g of ice per second. If the rod is replaced by another with half the length and A cylindrical rod with one end in a steam chamber and the other end in ice results [...]
A solid copper cube of edge 1 cm is suspended in an evacuated enclosure. Its temperature is found to fall from 100 C to 99 C in 100 s. Another solid copper cube of edge 2 cm, with
25
Oct
A solid copper cube of edge 1 cm is suspended in an evacuated enclosure. Its temperature is found to fall from 100 C to 99 C in 100 s. Another solid copper cube of edge 2 cm, with A solid copper cube of edge 1 cm is suspended in an evacuated enclosure. Its temperature is [...]
The total energy radiated from a black body source is collected for one minute and is used to heat a quantity of water. The temperature of water is found to increase form 20 C to 20.5 C.
25
Oct
The total energy radiated from a black body source is collected for one minute and is used to heat a quantity of water. The temperature of water is found to increase form 20 C to 20.5 C. The total energy radiated from a black body source is collected for one minute and is used to [...]
There is a formation of x cm thick layer of snow on water, when the temperature of air is -theta C (less than freezing point). If the thickness of layer increases from x to y in the time t, then
25
Oct
There is a formation of x cm thick layer of snow on water, when the temperature of air is -theta C (less than freezing point). If the thickness of layer increases from x to y in the time t, then then There is a formation of x cm thick layer of snow on water when [...]
A black metal foil is warmed by radiation from a small sphere at temperature T and at a distance d. It is found that the power received by the foil is P. If both the temperature and the distance
25
Oct
A black metal foil is warmed by radiation from a small sphere at temperature T and at a distance d. It is found that the power received by the foil is P. If both the temperature and the distance A black metal foil is warmed by radiation from a small sphere at temperature T and [...]
A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120 C. Then
25
Oct
A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120 C. Then A solid cube and a solid sphere of the same material have equal surface area. Both are at the same temperature 120 C. Then October 25, 2020 Category: Uncategorised (JEE Advanced [...]