Search Colleges, Courses, Exams, Questions and Articles

Ask a query on 8879100846 Ask Login | Sign Up

 

 

› Ask & Answer › Question

A heat engine has an efficiency of 1/6. When the temperature of sink is reduced by 62°C, its efficiency get doubled. The temperature of the source is :

Option 1 -

124 °C

Option 2 -

99 °C

Option 3 -

37 °C

Option 4 -

62 °C

0 2 Views | Posted a month ago
Asked by Shiksha User

  • 1 Answer

  • A

    Answered by

    alok kumar singh | Contributor-Level 10

    a month ago
    Correct Option - 2


    Detailed Solution:

    η = 1 - T? /T?
    1/6 = 1 - T? /T? (i)
    2η = 1/3 = 1 - (T? -62)/T? (ii)
    By (i) and (ii)
    (T? /T? ) = 5/6
    1/3 = 1 - (T? /T? ) + 62/T? = 1 - 5/6 + 62/T?
    1/3 = 1/6 + 62/T?
    1/6 = 62/T?
    T? = 62 × 6 = 372K = 99°C

Similar Questions for you

An ideal engine whose efficiency is 40%, receives heat at 500 K. If required efficiency is 50%, then intake temperature for the same exhaust temperature is
A
alok kumar singh

Kindly go through the solution

 

 

Choose the correct statement.
A
alok kumar singh

Heat is path dependent so path function but internal energy does not depend on path chosen.

Two waves of wavelength 50 cm and 51 cm produced 12 beats per second. The velocity of sound is
A
alok kumar singh

Kindly go through the solution

 

A gas undergoes a cyclic process ABCA as shown. Find the work done by the gas for

 

 
A
alok kumar singh

Work Area

->W = 1 2 * 600 * 4

= 1200J

8 moles of oxygen and 4 moles of nitrogen are at same temperature T and are mixed. The total internal energy is
A
alok kumar singh

U = nCvT

-> U = n 1 C v 1 T + n 2 C v 2 T  

-> 8 * 5 R 2 * T + 4 * 5 R 2 * T

= 30RT

Get authentic answers from experts, students and alumni that you won't find anywhere else

Sign Up on Shiksha

On Shiksha, get access to

  • 65k Colleges
  • 1.2k Exams
  • 687k Reviews
  • 1800k Answers

Learn more about...

Share Your College Life Experience

Write a Review

Didn't find the answer you were looking for?

Search from Shiksha's 1 lakh+ Topics

or

Ask Current Students, Alumni & our Experts

Ask Now
Community GuidelinesUser Points System
QuestionsDiscussionsTags
×

This website uses Cookies and related technologies for the site to function correctly and securely, improve & personalise your browsing experience, analyse traffic, and support our marketing efforts and serve the Core Purpose. By continuing to browse the site, you agree to Privacy Policy and Cookie Policy.

Need guidance on career and education? Ask our experts

Characters 0/140

The Answer must contain atleast 20 characters.

Add more details

Characters 0/300

The Answer must contain atleast 20 characters.

Keep it short & simple. Type complete word. Avoid abusive language. Next

Your Question

Edit

Add relevant tags to get quick responses. Cancel Post