Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions)
The diagram shows a circuit having a coil of resistance R=2.5(Ω) and inductance L connected to a conducting rod PQ which can slide on perfectly conducting circular ring of radius 10 cm with its centre at ‘P’. Assume that friction and gravity are absent and a constant uniform magnetic field of 5 T exist as shown in Fig.At t = 0, the circuit is switched on and simultaneously a time varying external torque is applied on the rod so that it rotates about P with a constant angular velocity 40rad/s. Find magnitude of this torque (in milli Nm) when current reaches half of its maximum value. Neglect the self-inductance of the loop formed by the circuit.
24
Oct
The diagram shows a circuit having a coil of resistance R=2.5(Ω) and inductance L connected to a conducting rod PQ which can slide on perfectly conducting circular ring of radius 10 cm with its centre at ‘P’. Assume that friction and gravity are absent and a constant uniform magnetic field of 5 T exist as [...]
A uniform copper bar 100 cm long is insulated on side, and has its ends exposed to ice and steam respectively. If there is a layer of water 0.1 mm thick at each end, calculate the
24
Oct
A uniform copper bar 100 cm long is insulated on side, and has its ends exposed to ice and steam respectively. If there is a layer of water 0.1 mm thick at each end, calculate the A uniform copper bar 100 cm long is insulated on side and has its ends exposed to ice and [...]
A fully charged capacitor C with initial charge q 0 is connected to a coil of self inductance L at t = 0. The time at which the energy is stored equally between the elrctric and the magnetic fields is
24
Oct
A fully charged capacitor C with initial charge q 0 is connected to a coil of self inductance L at t = 0. The time at which the energy is stored equally between the elrctric and the magnetic fields is A fully charged capacitor C with initial charge q 0 is connected to a coil [...]
An electric heater is used in a room of total wall area 137 m^2 to maintain a temperature of +20 C inside it, when the outside temperature is -10 C. The walls have three different layers of material.
24
Oct
An electric heater is used in a room of total wall area 137 m^2 to maintain a temperature of +20 C inside it, when the outside temperature is -10 C. The walls have three different layers of material. An electric heater is used in a room of total wall area 137 m^2 to maintain a [...]
A brass boiler has a base area of 0.15 m^2 and thickness 1.0 cm. It boils water at the rate of 6.0 kg/min, when placed on a gas . Estimate the temperature of the part of the flame
24
Oct
A brass boiler has a base area of 0.15 m^2 and thickness 1.0 cm. It boils water at the rate of 6.0 kg/min, when placed on a gas . Estimate the temperature of the part of the flame A brass boiler has a base area of 0.15 m^2 and thickness 1.0 cm. It boils water [...]
In the circuit shown below , the key K is closed at t = 0. The current through the battery is
24
Oct
In the circuit shown below , the key K is closed at t = 0. The current through the battery is In the circuit shown below the key K is closed at t = 0. The current through the battery is October 24, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) [...]
A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in the box, estimate the amount of ice remaining after 6 h. The outside temperature is 45
24
Oct
A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg of ice is put in the box, estimate the amount of ice remaining after 6 h. The outside temperature is 45 A thermocole cubical icebox of side 30 cm has a thickness of 5.0 cm. If 4.0 kg [...]
The opposite face of a cubical block of iron of cross-section 4.0 cm^2 are kept in contact with steam and melting ice. Calculate the quantity of ice melted in 10 minutes
24
Oct
The opposite face of a cubical block of iron of cross-section 4.0 cm^2 are kept in contact with steam and melting ice. Calculate the quantity of ice melted in 10 minutes The opposite face of a cubical block of iron of cross-section 4.0 cm^2 are kept in contact with steam and melting ice. Calculate the [...]
Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points A and B are maintained at different temperatures.
24
Oct
Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The points A and B are maintained at different temperatures. Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The [...]
The only possibility of heat flow in a thermos flask is through its cork which is 75 cm^2 in area and 5 cm thick. Its thermal conductivity is 0.0075 cal/cm-sec-C. The outside
24
Oct
The only possibility of heat flow in a thermos flask is through its cork which is 75 cm^2 in area and 5 cm thick. Its thermal conductivity is 0.0075 cal/cm-sec-C. The outside The only possibility of heat flow in a thermos flask is through its cork which is 75 cm^2 in area and 5 cm [...]