Home
Class 12
PHYSICS
In which case will the efficiency of a c...

In which case will the efficiency of a carnot cycle be higher : When the hot body temperature is increased by `Delta T`, or when the cold body temperature is decreased by the same magnitude ?

Text Solution

Verified by Experts

The efficiency is given is
`eta = (T_1 - T_2)/(T_1), T_1 gt T_2`
Now in the two cases the efficiencies are
`eta_h = (T_1 + Delta T - T_2)/(T_1 + Delta T), T_1` encreased
`eta_l = (T_1 - T_2 + Delta T)/(T_1), T_2` decreased
Thus `eta_h lt n_l`.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • THERMODYNAMICS AND MOLECULAR PHYSICS

    IE IRODOV, LA SENA & SS KROTOV|Exercise Liquids Capillary Effects|25 Videos

  • THERMODYNAMICS AND MOLECULAR PHYSICS

    IE IRODOV, LA SENA & SS KROTOV|Exercise Phase Transformations|35 Videos

  • THERMODYNAMICS AND MOLECULAR PHYSICS

    IE IRODOV, LA SENA & SS KROTOV|Exercise Kinetic Theory Of Gases|51 Videos

  • PHYSICAL FUNDAMENTALS OF MECHANICS

    IE IRODOV, LA SENA & SS KROTOV|Exercise Relativistic Mechanics|49 Videos

Similar Questions

Explore conceptually related problems

When the temperature of a body increases

What will be the increment in heat energy radiated when the temperature of hot body is raised by 5%?

Knowledge Check

  • Question Stimulus :- If the hot body temperature increase by 50% then the value of emitted radiation increased with-

    A
    `12.5%`
    B
    `200%`
    C
    `300%`
    D
    `400%`

  • The efficiency of a Carnot engine which operates between the two temperatures T_1=500K and T_2=300K is

    A
    0.75
    B
    0.5
    C
    0.4
    D
    0.25

  • When the human body temperature falls by about 2-3.5° F below the normal body temperature, the condition is known as

    A
    Fever
    B
    Hypothermia
    C
    Hyperthermia
    D
    Hyperpyrexia

    • Similar Questions

    Explore conceptually related problems

    A Carnot engine efficiency 1//5 . Efficiency becomes 1//3 when the temperature of sink is decreased by 50 K. What is the temperature of the sink (in K)?

    The efficiency of a Carnot cycle is 1//6 . By lowering the temperature of sink by 65 K , it increases to 1//3 . The initial and final temperature of the sink are

    The efficiency of Carnot engine when source temperature is T 1 and sink temperature is T 2 will be

    A carnot engine has efficiency 1//5 . Efficiency becomes 1//3 when temperature of sink is decreased by 50 K What is the temperature of sink ?

    If the temperature of a hot body is raised would increased by

    Home
    Profile