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A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency?
31
Aug
A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency? A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature [...]
Convert 54 km/h into m/s
31
Aug
Convert 54 km/h into m/s Convert 54 km/h into m/s August 31, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) ,
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperatures of the source is
31
Aug
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency is doubled. Temperatures of the source is An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C its efficiency is doubled. Temperatures of the source is August 31, 2020 Category: Chapter [...]
The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20 degree C, the temperature of the surroundings to which it rejects heat is :
31
Aug
The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20 degree C, the temperature of the surroundings to which it rejects heat is : The coefficient of performance of a refrigerator is 5. If the temperature inside freezer is -20 degree C the temperature of the surroundings to which [...]
A calorie is a unit of heat or energy and it equals about 4.2 J where 1 J = 1 kgm^2 s^-2 .Suppose we employ a system of units in which the units of mass equals α kg, the units of length equals β m, the unit of time is γ s. Show that a calorie has a magnitude 4.2 α^-1 β^−2 γ^2 in terms of the new units.
31
Aug
A calorie is a unit of heat or energy and it equals about 4.2 J where 1 J = 1 kgm^2 s^-2 .Suppose we employ a system of units in which the units of mass equals α kg, the units of length equals β m, the unit of time is γ s. Show that a [...]
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A calorie is a unit of heat or energy and it equals about 4.2 J where 1 J = 1 kgm^2 s^-2 .Suppose we employ a system of units in which the units of mass equals α kg ,
the unit of time is γ s. Show that a calorie has a magnitude 4.2 α^-1 β^−2 γ^2 in terms of the new units. ,
the units of length equals β m ,
To determine the young’s modulus of a wire , the formula is Y = (F)/( A) . (L)/ ( Delta l) , where L = l ength ,A = area of cross – section of the wire , DeltaL = change in the length of the wire when streched with a force F. Find the conversion factor to change it from CGS t o MKS system.
31
Aug
To determine the young’s modulus of a wire , the formula is Y = (F)/( A) . (L)/ ( Delta l) , where L = l ength ,A = area of cross – section of the wire , DeltaL = change in the length of the wire when streched with a force F. Find the [...]
A Carnot engine, having an efficiency of n = 1/10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature
31
Aug
A Carnot engine, having an efficiency of n = 1/10 as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature A Carnot engine having an efficiency of n = 1/10 as heat engine is used as [...]
The temperature inside a refrigerator is t2C and the room temperature is t1C. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be
31
Aug
The temperature inside a refrigerator is t2C and the room temperature is t1C. The amount of heat delivered to the room for each joule of electrical energy consumed ideally will be The temperature inside a refrigerator is t2C and the room temperature is t1C. The amount of heat delivered to the room for each joule [...]
In CGS system the magnitude of the force is 100 dynes. In another system where the fundamental physical quantities are kilogram, meter, and minute, find the magnitude of the force
31
Aug
In CGS system the magnitude of the force is 100 dynes. In another system where the fundamental physical quantities are kilogram, meter, and minute, find the magnitude of the force and minute find the magnitude of the force In CGS system the magnitude of the force is 100 dynes. In another system where the fundamental [...]
A refrigerator works between 4°C and 30°C. It is required to remove 600 calories of heat every second in order to keep tire temperature of the refrigerated space constant. The power required is (Take 1 cal = 4.2 Joules)
31
Aug
A refrigerator works between 4°C and 30°C. It is required to remove 600 calories of heat every second in order to keep tire temperature of the refrigerated space constant. The power required is (Take 1 cal = 4.2 Joules) A thermodynamic system is taken through the cycle ABCD as shown in the figure. Heat rejected [...]