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Three cylindrical rods A, B and C of equal lengths and equal diameters are joined in series as shown if Fig. Their thermal conductivities are 2K, K and 0.5K, respectively. In steady state, if the free ends of rods A and C are at 100C and 0C, respectively, calculate the temperature at the two
01
Sep
Three cylindrical rods A, B and C of equal lengths and equal diameters are joined in series as shown if Fig. Their thermal conductivities are 2K, K and 0.5K, respectively. In steady state, if the free ends of rods A and C are at 100C and 0C, respectively, calculate the temperature at the two B [...]
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B and C of equal lengths and equal diameters are joined in series as shown if Fig. Their thermal conductivities are 2K ,
calculate the temperature at the two ,
if the free ends of rods A and C are at 100C and 0C ,
K and 0.5K ,
respectively ,
respectively. In steady state ,
Three cylindrical rods A ,
An electric heater is used in a room of total wall area 150m^2 to maintain a temperature is −5C. The innermost layer is of wood of thichness 2.0 cm, the middle layer is of cement of thickness 1.0 cm and the outer-most layer is of brick of thickness 20 cm. Find the power of the electric heater.
01
Sep
An electric heater is used in a room of total wall area 150m^2 to maintain a temperature is −5C. The innermost layer is of wood of thichness 2.0 cm, the middle layer is of cement of thickness 1.0 cm and the outer-most layer is of brick of thickness 20 cm. Find the power of the [...]
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An electric heater is used in a room of total wall area 150m^2 to maintain a temperature is −5C. The innermost layer is of wood of thichness 2.0 cm ,
the middle layer is of cement of thickness 1.0 cm and the outer-most layer is of brick of thickness 20 cm. Find the power of the electric heater. ,
Two metal cubes A and B of same size are arranged as shown in Figure. The extreme ends of the combination are maintained at the indicated temperatures. The arrangement is thermally insulated. The coefficients of thermal conductivity of A and B are 300W/mC and
01
Sep
Two metal cubes A and B of same size are arranged as shown in Figure. The extreme ends of the combination are maintained at the indicated temperatures. The arrangement is thermally insulated. The coefficients of thermal conductivity of A and B are 300W/mC and A closed cubical box is made of perfectly insulating material and [...]
Three capacitors of capacitances 3μF, 6μF, and 4μF are connected as shown across a battery of emg 6V.i. Find the equivalent capacitance, ii. Find the potential difference and charge on each capacitor. iii. Find the energy stored in the system of capacitors and total energy stored in the system of capacitor.
01
Sep
Three capacitors of capacitances 3μF, 6μF, and 4μF are connected as shown across a battery of emg 6V.i. Find the equivalent capacitance, ii. Find the potential difference and charge on each capacitor. iii. Find the energy stored in the system of capacitors and total energy stored in the system of capacitor. 6μF and 4μF are [...]
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6μF ,
and 4μF are connected as shown across a battery of emg 6V.i. Find the equivalent capacitance ,
ii. Find the potential difference and charge on each capacitor. iii. Find the energy stored in the system of capacitors and total energy stored in the system of capacitor. ,
Three capacitors of capacitances 3μF ,
A closed cubical box is made of perfectly insulating material and the only way for heat to enter or leave the box is through two solid cylindrical metal plugs, each of cross sectional area 12cm^2 and length 8cm fixed in the opposite walls of the box. The outer surface of one plug is kept at a temperature of 100C . while the outer surface of the plug is maintained at a temperature of 4C . The thermal conductivity of the material of the plug
01
Sep
A closed cubical box is made of perfectly insulating material and the only way for heat to enter or leave the box is through two solid cylindrical metal plugs, each of cross sectional area 12cm^2 and length 8cm fixed in the opposite walls of the box. The outer surface of one plug is kept at [...]
A capacitor is made of a flat plate nof area A and B second plate having a stair -like structure as shown in figure (31-E9). The width of each stair is a and the height is b . Find the capacitance of the assembly
01
Sep
A capacitor is made of a flat plate nof area A and B second plate having a stair -like structure as shown in figure (31-E9). The width of each stair is a and the height is b . Find the capacitance of the assembly all the capacitors were uncharged. Find the emf ε of the [...]
Water is being boiled in a flat bottomed kettle placed on a stove The area of the bottom is 3000cm^2 and the thickness is 2mm If the amount pf steam produced is 1gm/min then the difference of the temperature between the inner and the outer surface of
01
Sep
Water is being boiled in a flat bottomed kettle placed on a stove The area of the bottom is 3000cm^2 and the thickness is 2mm If the amount pf steam produced is 1gm/min then the difference of the temperature between the inner and the outer surface of 22.2C below the temperature of the outside wall. [...]
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22.2C below the temperature of the outside wall. If the motor of the refrigerator runs 15% of the time while the door is closed ,
An ordinary refrigerator is thermally equivalent to a box of corkboard 90 mm thick and 5.6m2 in inner surface area. When the door is closed ,
at what rate must heat be taken from the interior while the motor is running? ,
on the average ,
the inside wall is kept ,
In the circuit shown in the potential difference between the point a and b is 4V, Find the emf ε of the battery. Assume that before connecting the battery in the circuit, all the capacitors were uncharged.
01
Sep
In the circuit shown in the potential difference between the point a and b is 4V, Find the emf ε of the battery. Assume that before connecting the battery in the circuit, all the capacitors were uncharged. all the capacitors were uncharged. Find the emf ε of the battery. Assume that before connecting the battery [...]
An ordinary refrigerator is thermally equivalent to a box of corkboard 90 mm thick and 5.6m2 in inner surface area. When the door is closed, the inside wall is kept, on the average, 22.2C below the temperature of the outside wall. If the motor of the refrigerator runs 15% of the time while the door is closed, at what rate must heat be taken from the interior while the motor is running?
01
Sep
An ordinary refrigerator is thermally equivalent to a box of corkboard 90 mm thick and 5.6m2 in inner surface area. When the door is closed, the inside wall is kept, on the average, 22.2C below the temperature of the outside wall. If the motor of the refrigerator runs 15% of the time while the door [...]
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22.2C below the temperature of the outside wall. If the motor of the refrigerator runs 15% of the time while the door is closed ,
An ordinary refrigerator is thermally equivalent to a box of corkboard 90 mm thick and 5.6m2 in inner surface area. When the door is closed ,
at what rate must heat be taken from the interior while the motor is running? ,
on the average ,
the inside wall is kept ,
Three capacitors are arranged as shown in. Find the equivalent capactiy across the points A and B.
01
Sep
Three capacitors are arranged as shown in. Find the equivalent capactiy across the points A and B. Three capacitors are arranged as shown in. Find the equivalent capactiy across the points A and B. September 1, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,