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

The operating temperature of an incandescent bulb (with a tungsten filament) of power 60 W is 3000 K. If the surface area of the filament be 25 mm^2, find its emissivity e. find its emissivity e. The operating temperature of an incandescent bulb (with a tungsten filament) of power 60 W is 3000 K. If [...]

Three uncharged capacitors of capacities C1, C2 and C3 are connected as shown in the figure to one another and the potentials V1, V2 and V3 respectively. Then the potential at O will be C2 and C3 are connected as shown in the figure to one another and the potentials V1 Three uncharged capacitors of [...]

A spherical body with a radius of 12 cm radiates 450 watt power at 500 K. If the radius were halved and the temperature doubled, the power radiated in watt would be A spherical body with a radius of 12 cm radiates 450 watt September 1, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma [...]

A finite ladder is constructed by connecting several sections of 3μF, 6μF capacitor combination as shown. The value of C such that the equivalent capacitance of ladder between the points A and B becomes independent of the number of section in between 6μF capacitor combination as shown. The value of C such that the equivalent [...]

An electric heater of surface area 200cm^2 emits radiant energy of 60 kJ at time interval of 1 min. Determine its emissive power. If its emissivity be 0.45, what would be the radiant energy emitted by a black body in one hour, identical to the electrical heater in all respects? An electric heater of surface [...]

Find the equivalent capacitance of the infinite ladder shown in figure between the points A and B. Find the equivalent capacitance of the infinite ladder shown in figure between the points A and B. September 1, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

Three identical rods of length 1m each, having cross-section area of 1 cm^ 2 each and made of Aluminium, copper and steel respectively are maintained at temperatures of 12 C, 4C and 50C respectively at their separate ends. Find the temperature of their common junction. 4C and 50C respectively at their separate ends. Find the [...]

In when the switch is swapped from 1 to 2, find the heat produced in the circuit. find the heat produced in the circuit. In when the switch is swapped from 1 to 2 September 1, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,

One end of the uniform brass rod 15cm long and 20 cm^2 cross-sectional area kept at 100C. The other end is at perfect contact with an iron rod of identical cross-section, but length 8cm. The lateral surface of the composite rod but length 8cm. The lateral surface of the composite rod One end of the [...]

The capacitors in are initially uncharged and are cannected as in the diagram with switch S open. The applied potential differnce is Vab = +360V. a. What is the potential differnce Vcd b What is the potential deffernce across each capacitor afrer switch S is closed? c. How much charge will flow through the awitch [...]