wiz-icon
MyQuestionIcon
MyQuestionIcon
10
You visited us 10 times! Enjoying our articles? Unlock Full Access!
Question

A real heat engine has an efficiency of 40%. The work output of the engine is 100 kJ per cycle. How much energy is extracted from the high temperature reservoir per cycle ?

A
40 kJ
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
250 kJ
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
400 kJ
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Can be calculated only if the engine is a Carnot engine.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is B 250 kJ
Given,
Efficiency of heat engine (η)=40%
Work output (W)=100 kJ
Using the formula,
Efficiency (η)=Work output(W)Heat input(Q)
0.4=100Heat input(Q)
Heat extracted from high temperature reservoir per cycle
Q=1000.4=250 kJ
Thus, option (b) is the correct answer.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon