| ⇦ | 
| ⇨ |
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: - Which of the following is not a transverse wave?
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- Two coaxial solenoids are made by winding thin insulated wire over a pipe
- A ball of mass 2 kg and another of mass 4 kg are dropped together from
- A source of light is placed at a distance of 50 cm from a photocell and the stopping
Topics: Thermodynamics
(179)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which of the following is not a transverse wave?
- A wave travelling in the +ve x-direction having displacement along y-direction as 1m
- Two coaxial solenoids are made by winding thin insulated wire over a pipe
- A ball of mass 2 kg and another of mass 4 kg are dropped together from
- A source of light is placed at a distance of 50 cm from a photocell and the stopping
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