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

The surface of a household radiator has an emissivity of 0.55 and an area of 1.5 m^2. Its equilibrium temperature is 50 C and the surroundings are at 22 C The surface of a household radiator has an emissivity of 0.55 and an area of 1.5 m^2. Its equilibrium temperature is 50 C and the [...]

Two spherical black bodies A and B, having radii rA and rB = 2rA emit radiation with peak intensities at wavelength 400 nm and 800 nm respectively. If their temperature are TA and TB having radii rA and rB = 2rA emit radiation with peak intensities at wavelength 400 nm and 800 nm respectively. If [...]

A metal cylinder of mass 0.5 kg is heated electrically by a 12 W heater in a room at 15 C. The cylinder temperature rises uniformly to 20 C in 5 min and finally becomes constant at A metal cylinder of mass 0.5 kg is heated electrically by a 12 W heater in a room [...]

Two ends of area A of a uniform rod of thermal conductivity K are maintained at different but constant temperatures. At any point on the rod, the temperature gradient is dT/dl. the temperature gradient is dT/dl. Two ends of area A of a uniform rod of thermal conductivity K are maintained at different but constant [...]

The two ends of a uniform rod of thermal conductivity k are maintained at different but constant temperatures. The temperature gradient at any point on the rod is d theta / d l The two ends of a uniform rod of thermal conductivity k are maintained at different but constant temperatures. The temperature gradient at [...]

Two spheres A and B have same radius but the heat capacity of A is greater than that of B. The surfaces of both are painted black. They are heated to the same temperature and allowed to cool. Two spheres A and B have same radius but the heat capacity of A is greater than [...]

Eleven identical rods are arranged as shown in figure. Each rod has length l, cross sectional area A and thermal conductivity of material L. Ends A and F are maintained at temperatures cross sectional area A and thermal conductivity of material L. Ends A and F are maintained at temperatures Eleven identical rods are arranged [...]

A circular ring (centre O) of radius a, and of uniform cross-section is made up of three different metallic rods AB, BC and CA (joined together at the points A, B and C in pairs) A circular ring (centre O) of radius a and of uniform cross-section is made up of three different metallic rods [...]

Seven identical rods of material of thermal conductivity k are connected as shown in the given figure. All the rods are of identical length l and cross-sectional area A. If the one end B Seven identical rods of material of thermal conductivity k are connected as shown in the given figure. All the rods are [...]

Two identical objects A and B are at temperatures TA and TB, respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (TA > T > TB.) respectively. Both objects are placed in a room with perfectly absorbing walls maintained at a temperature T (TA > T > [...]