An engine has an efficiency of 1/6. When the temperature of sink is reduced

⇦

⇨

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:

1. Minimum and maximum values of Poisson’s ratio for a metal lies between
2. In a ionised gas,the mobile charge carriers are
3. α-particles, deuterons and protons of same energy are moving in a perpendicular
4. A particle free to move along X-axis has potential energy given as U(X) =k(1-e⁻ˣ²)
5. Steam at 100⁰C is passed into 20 g of water at 10°C. When water acquires a temperature

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