Home
Class 12
PHYSICS
In one cycle, the working substance in a...

In one cycle, the working substance in a heat engine absorbs 3000 J from the hot reservoir. If 2250 J are wasted per cycle, the efficiency of the engine is

A

`75%`

B

`50%`

C

`7.5%`

D

`25 %`.

Text Solution

Verified by Experts

The correct Answer is:
D
`eta=(W)/(Q_(h))and W=Q_(h)-Q_(c)`
Promotional Banner

Topper's Solved these Questions

  • MULTIPLE CHOICE QUESTIONS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Wave Theory of Light|5 Videos

  • MULTIPLE CHOICE QUESTIONS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Interference and Diffraction|9 Videos

  • MULTIPLE CHOICE QUESTIONS

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Stationary Waves|6 Videos

  • MODEL QUESTION PAPER FOR PRACTICE

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise SECTION-D|5 Videos

  • QUESTION BANK 2021

    NAVNEET PUBLICATION - MAHARASHTRA BOARD|Exercise Semiconductors Devices (Long Answer ( LA) ( 4 marks Each) )|3 Videos

Similar Questions

Explore conceptually related problems

In one cycle, a heat engine rejects 80% of the energy absorbed from the hot reservoir to the cold reservoir . Calculate the efficiency of the engine.

A carnot engine absorbs 500J of heat from a reservoir at 227^(@)C and rejects of seek (ii) efficiency of engine (iii) amount of useful work done per cycle.

A carnot engine absorbs 1000J of heat energy from a reservoir at 127^(@)C and rejecs 600J of heat energy during each cycle. Calculate (i) efficiency of the engine, (ii) temperature of sink, (iii) amount of useful work done per cycle.

In a heat engine, the temperature of the working substance at the end of the cycle is

A heat engine absorbs 300J of heat at 627^(@)C and rejects a part of it at 27^(@)C . Find the work done by the engine.

In a heat engine, the temperature of the source and sink are 500 K and 375 K. If the engine consumes 25xx10^5J per cycle, find(a) the efficiency of the engine, (b) work done per cycle, and (c) heat rejected to the sink per cycle.

If a steam engine delivers 6.0xx10^(8)J of work per minute and absorbs 5.4xx10^(9)J of heat per minute from its boiler then the efficiency of the engine is

A steam engine delivers 5.4xx10^(8)J of work per minute and absorbs 3.6xx10^(9)J of heat per minute from its boiler. What is the efficiency of the engine? How much heat is wasted per minute?

A carnot engine takes in 3000 kcal of heat from a reservoir at 627°C and gives it to a sink at 27°C. The work done by the engine is