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Three rods of material X and three rods of material Y are connected as shown in figure. All the rods are identical in length and cross-sectional area. If the end A is maintained at 60C and the junction E at 10C, calculate the temperatures of the junctions B,C,D.
02
Sep
Three rods of material X and three rods of material Y are connected as shown in figure. All the rods are identical in length and cross-sectional area. If the end A is maintained at 60C and the junction E at 10C, calculate the temperatures of the junctions B,C,D. A body cools in a cold surrounding [...]
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A body cools in a cold surrounding obeying Newton's law of cooling. It is found that from t = 0 to t = t1 ,
A cylindrical rod of heat capacity 120J/K in a room temperature 27C is heated internally by heater of power 250W ,
from t = t1 will it loose one fourth the total heat? ,
it loses half the total heat. In what time ,
A cylindrical rod of heat capacity 120J/K in a room temperature 27C is heated internally by heater of power 250W, The steady state temperature attained by the rod is 37C. Fin the following: (a) The initial rate of increse in temperature (b) The steady state rate of emission of radiant heat. If the heater is switched off, find (c) The initial rate of decrease is temperature
02
Sep
A cylindrical rod of heat capacity 120J/K in a room temperature 27C is heated internally by heater of power 250W, The steady state temperature attained by the rod is 37C. Fin the following: (a) The initial rate of increse in temperature (b) The steady state rate of emission of radiant heat. If the heater is [...]
Tags:
A body cools in a cold surrounding obeying Newton's law of cooling. It is found that from t = 0 to t = t1 ,
A cylindrical rod of heat capacity 120J/K in a room temperature 27C is heated internally by heater of power 250W ,
from t = t1 will it loose one fourth the total heat? ,
it loses half the total heat. In what time ,
When switch S is thrown to the left in figure, the plates of capacitor 1 acquire a potential difference V0. Capacitors 2 and 3 are initially uncharged. The switch is now thrown to the right. What are the final charges q1, q2 and q3 on the capacitors?
02
Sep
When switch S is thrown to the left in figure, the plates of capacitor 1 acquire a potential difference V0. Capacitors 2 and 3 are initially uncharged. The switch is now thrown to the right. What are the final charges q1, q2 and q3 on the capacitors? q2 and q3 on the capacitors? the plates [...]
A body cools in a cold surrounding obeying Newton’s law of cooling. It is found that from t = 0 to t = t1, it loses half the total heat. In what time, from t = t1 will it loose one fourth the total heat?
02
Sep
A body cools in a cold surrounding obeying Newton’s law of cooling. It is found that from t = 0 to t = t1, it loses half the total heat. In what time, from t = t1 will it loose one fourth the total heat? A body cools in a cold surrounding obeying Newton's law [...]
Five identical capacitors each of magnitude 5μF are arranged with a battery of emf 20V as shown in . Initially, the switch that flows from point A to point B, when the switch is closed.
02
Sep
Five identical capacitors each of magnitude 5μF are arranged with a battery of emf 20V as shown in . Initially, the switch that flows from point A to point B, when the switch is closed. Five identical capacitors each of magnitude 5μF are arranged with a battery of emf 20V as shown in . Initially [...]
According to stefan’s law of radiation a black body radiates energy σT^4 from is unit surface area every second where T is the surface temperature of the black body and σ=5.67×10^−8W/m^2K^4 is known as Stefan’s of as a ball of radius 0.5m When detonated it reaches temperature of 106K and can be treated as a black body Estimate the power it radiates .
02
Sep
According to stefan’s law of radiation a black body radiates energy σT^4 from is unit surface area every second where T is the surface temperature of the black body and σ=5.67×10^−8W/m^2K^4 is known as Stefan’s of as a ball of radius 0.5m When detonated it reaches temperature of 106K and can be treated as a [...]
Two identical capacitors having plate separation d0 are connected parallel to each other across the points A and B as shown in. A charge Q is imparted to the system by removed Now the first plate of the first capacitor and the second plate of the second capacitor start moving with constant velocity u0 toward left. Find the magnitude of the current flowing in the loop during this process.
02
Sep
Two identical capacitors having plate separation d0 are connected parallel to each other across the points A and B as shown in. A charge Q is imparted to the system by removed Now the first plate of the first capacitor and the second plate of the second capacitor start moving with constant velocity u0 toward [...]
Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are same. The two bodies emit total radiant power at the same rate. The wavelength λB corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in the radiation from A by 1.0 μm. If the temperature of A is 5802 K, calculate
02
Sep
Two bodies A and B have thermal emissivities of 0.01 and 0.81 respectively. The outer surface areas of the two bodies are same. The two bodies emit total radiant power at the same rate. The wavelength λB corresponding to maximum spectral radiancy from B is shifted from the wavelength corresponding to maximum spectral radiancy in [...]
A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated with plastic insulation of thickness 0.06 mm. When a current of 5 A flows through the wire, find the temperature difference across the insulation in steady state.
02
Sep
A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated with plastic insulation of thickness 0.06 mm. When a current of 5 A flows through the wire, find the temperature difference across the insulation in steady state. A 2m long wire of resistance 4 ohm and diameter 0.64 mm is coated [...]
Some capacitors each of capacitance 30μF are connected as shown in. Calculate the equivalent capacitance between terminals A and B
02
Sep
Some capacitors each of capacitance 30μF are connected as shown in. Calculate the equivalent capacitance between terminals A and B Some capacitors each of capacitance 30μF are connected as shown in. Calculate the equivalent capacitance between terminals A and B September 2, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,