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An inductor of inductance L = 400 mH and resistors of resistances R1 = 2 Ω and R 2 = 2 Ω are connected to a battery of emf E=12V as shown in the figure. The internal resistance of the battery is negligible. The switch S is closed at time t = 0.
24
Oct
An inductor of inductance L = 400 mH and resistors of resistances R1 = 2 Ω and R 2 = 2 Ω are connected to a battery of emf E=12V as shown in the figure. The internal resistance of the battery is negligible. The switch S is closed at time t = 0. In the [...]
Two conductors A and B given in previous problem are connected in parallel as shown in the given figure. (1) Determine the equivalent thermal resistance.
24
Oct
Two conductors A and B given in previous problem are connected in parallel as shown in the given figure. (1) Determine the equivalent thermal resistance. Two conductors A and B given in previous problem are connected in parallel as shown in the given figure. (1) Determine the equivalent thermal resistance. October 24, 2020 Category: Uncategorised [...]
A certain volume of copper is drawn into a wire of radius a and is wrapped in shape of a helix having radius r(>>a). The windings are as close as possible without overlapping. Self inductance of the inductor so obtained is L1. Another wire of radius 2 a is drawn using same volume of copper and wound in the fashion as described above. This time the inductance is L2. Find L1/L2
24
Oct
A certain volume of copper is drawn into a wire of radius a and is wrapped in shape of a helix having radius r(>>a). The windings are as close as possible without overlapping. Self inductance of the inductor so obtained is L1. Another wire of radius 2 a is drawn using same volume of copper [...]
Two rods A and B of same length and cross-sectional area are connected in series and a temperature difference of 100 c is maintained across the combined as shown in the given figure.
24
Oct
Two rods A and B of same length and cross-sectional area are connected in series and a temperature difference of 100 c is maintained across the combined as shown in the given figure. Two rods A and B of same length and cross-sectional area are connected in series and a temperature difference of 100 c [...]
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) [...]