Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)

In Newton’s experiment of cooling, the water equivalent of two similar calorimeters is 10 g each. They are filled with 350 g of water and 300 g of liquid (equal volumes) separately. In Newton's experiment of cooling the water equivalent of two similar calorimeters is 10 g each. They are filled with 350 g of [...]

A bucket full of hot water cools from 75 C to 70 C in time T1, from 70 C to 65 C in time T2 and from 65 C to 60 C in time T3, then A bucket full of hot water cools from 75 C to 70 C in time T1 from 70 C [...]

Hot water cools from 60 C to 50 C in the first 10 minutes and to 42 C in the next 10 minutes. The temperature of the surrounding is Hot water cools from 60 C to 50 C in the first 10 minutes and to 42 C in the next 10 minutes. The temperature of [...]

The energy spectrum of a black body exhibits maximum energy around a wavelength lemda 0. The temperature of the black body is now changed such that the energy is maximum The energy spectrum of a black body exhibits maximum energy around a wavelength lemda 0. The temperature of the black body is now changed such [...]

If between wavelength lemda and lemda + dlemda, e lemda, and a lemda are the emissive and absorptive powers of a body and Elemda is the emissive power of a perfectly black body, and a lemda are the emissive and absorptive powers of a body and Elemda is the emissive power of a perfectly black [...]

A sphere and a cube of same material and same volume are heated upto same temperature and allowed to cool in the same surroundings. The ratio of the amounts of radiations A sphere and a cube of same material and same volume are heated upto same temperature and allowed to cool in the same surroundings. [...]

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. 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. 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 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 [...]