| ⇦ | 
| ⇨ |
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62⁰C, its efficiency is doubled. Temperature of the source is
Options
(a) 37⁰C
(b) 62⁰C
(c) 99⁰C
(d) 124⁰C
Correct Answer:
99⁰C
Explanation:
Since efficiency of engine is ? = 1 – T₂ / T₁
According to the problem, 1/6 = 1 – T₂ / T₁ ……(1)
When the temperature of the sink is reudced by 62⁰C, its efficiency is doubled
2 (1/6) = 1 – T₂ – 62 / T₁ ……..(2)Solving (1) and (2) T₂ = 372 K
T₁ = 99⁰C = Temperature of source.
Related Questions: - An isolated sphere has a capacitance of 50pF. What would be the radius of the sphere?
- The value of Planck’s constant is
- Two sources of sound placed close to each other are emitting progressive waves
- What is the energy of He⁺ electron in first orbit?
- A body undergoes no change in volume. Poisson’s ratio is
Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An isolated sphere has a capacitance of 50pF. What would be the radius of the sphere?
- The value of Planck’s constant is
- Two sources of sound placed close to each other are emitting progressive waves
- What is the energy of He⁺ electron in first orbit?
- A body undergoes no change in volume. Poisson’s ratio is
Topics: Thermodynamics (179)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply