Access free live classes and tests on the app
Download
+
Unacademy
  • Goals
    • AFCAT
    • AP EAMCET
    • Bank Exam
    • BPSC
    • CA Foundation
    • CAPF
    • CAT
    • CBSE Class 11
    • CBSE Class 12
    • CDS
    • CLAT
    • CSIR UGC
    • GATE
    • IIT JAM
    • JEE
    • Karnataka CET
    • Karnataka PSC
    • Kerala PSC
    • MHT CET
    • MPPSC
    • NDA
    • NEET PG
    • NEET UG
    • NTA UGC
    • Railway Exam
    • SSC
    • TS EAMCET
    • UPSC
    • WBPSC
    • CFA
Login Join for Free
avtar
  • ProfileProfile
  • Settings Settings
  • Refer your friendsRefer your friends
  • Sign outSign out
  • Terms & conditions
  • •
  • Privacy policy
  • About
  • •
  • Careers
  • •
  • Blog

© 2023 Sorting Hat Technologies Pvt Ltd

Watch Free Classes
    • Free courses
    • JEE Main 2024
    • JEE Main 2024 Live Paper Discussion
    • JEE Main Rank Predictor 2024
    • JEE Main College Predictor 2024
    • Stream Predictor
    • JEE Main 2024 Free Mock Test
    • Study Materials
    • Notifications
    • JEE Advanced Syllabus
    • JEE Books
    • JEE Main Question Paper
    • JEE Coaching
    • Downloads
    • JEE Notes & Lectures
    • JEE Daily Videos
    • Difference Between
    • Full Forms
    • Important Formulas
    • Exam Tips
JEE Main 2026 Preparation: Question Papers, Solutions, Mock Tests & Strategy Unacademy » JEE Study Material » Physics » Perpetual Motion Machine of First Kind

Perpetual Motion Machine of First Kind

Perpetual motion is the movement of bodies that never ends and continues forever in an undisturbed system. Read about Perpetual motion machines of the kind that is first.

Table of Content
  •  

Perpetual motion is the movement of bodies that never ends and continues forever in an undisturbed system. A perpetual motion machine is based on a hypothesis stating that the body can work infinitely without any external energy source. Technically speaking, a device that can move or work infinitely is impossible as it would violate thermodynamics’ first and second laws. The law of thermodynamics is applied to all machines, not depending on the size of the devices or system. 

Principles of Perpetual Motion Machine of First Kind 

The Concept of a perpetual machine of the first kind is that it violates both the first and second law of thermodynamics. It can do work infinitesimally without any energy input. 

  • The law of conservation states that in an isolated system, a system can not produce new energy. The job carried out by the heat machines and their result is always smaller compared to the input heating power

  • The work done by the heat engines and their output is always smaller than the input heating power. The remaining heat is wasted in the surroundings. 

  • The heat engine’s efficiency is less than the Carnot efficiency because of the irreversibility caused by the speed of the processes.

Classification 

The classification of perpetual motion machines is based on the violation of thermodynamics law by the engines. 

  • The first kind of perpetual motion machine does work without any energy input and hence violates the first law of thermodynamics.

  • The 2nd sort of perpetual movement machine directly converts power that is thermal work that is mechanical, violating the following legislation of thermodynamics.

  • The third kind of perpetual motion machine maintains motion forever by eliminating motion and other dissipative forces because of its mass.

What is a closed system?

A closed system is a system that has no interactions with its surroundings and remains isolated on its own. A closed system implies no external forces acting on or within the system and there is no net mass transfer between the system and its surroundings.

It’s not just about what goes in or out, but also about where things go when they leave.

For a process to be considered “closed,” it must also be a steady state and this means that the concentrations of all reactants and products do not change with time. In addition, if any reactions occur in the reaction vessel, they must have reached equilibrium with one another before any physical measurements can be taken.

Theory on how to make a perpetual machine 

The machine is based on Faraday’s law of electromagnetic induction, which states that when there is a relative motion between an induction coil and magnet, then the number of lines magnetic forced with the induction coil is fluctuated with the result in fluctuation of magnetic flux associated with the coil, due to which an electromotive force also known as EMF is induced in the coil and as a result nn induced electric current tarts following in the coil.”

e=N d𝞥/dt

Where, 

e = induced EMF

N = number of turns of wire in coil

d𝞥 = change in magnetic flux 

When 𝞥 = BA cos𝝷

Where 𝞥 = magnetic flux 

B = intensity of magnetic flux 

 A = area of coil 

dt = time of one cyclic fluctuation on magnetic flux

Therefore, 

Pm = F.rϖ

Pm = W.rϖ

Pm = mgrϖ

m = mass of rotating body 

ϖ = angular velocity 

g = acceleration due to gravity 

Construction of machine 

The machines contains of the following parts 

  • Crank 

  • Connecting rod

  • Induction oil

  • Electric motor

  • Chargeable battery 

  • Wheels

  • Neodymium magnet  

The induction coil arrangement and current production volume of the magnet depends on the resistivity of the material of the induction coil. When using a copper wire the value of the resistivity is 1.7 × 10-8 ohm.meter. The magnetic power of the magnet is concerned will be between 10000 gauss to 13000 gauss depending on the grade of the magnet whether it is a N30 grade or N50 grade. 

Working

The machine’s work is based on two phases of operations. The first is that that power is supplied to the motor connected to the electric circuit. Once the engine starts rotating, the shaft coupled to the motor will also begin moving with the wheels attached to the shaft. This will cause the connecting rod to go up and down, resulting in the movement of the magnet connected to the rod. The result of all these moments will give rise to relative motion. 

The second phase is after supplying electricity to the motor with the help of batteries so that the wheels rotate for some time until the battery runs out of power. Since the wheel is rotating, the magnets will also reciprocate up and down the induction coil, which will produce electric current and be supplied to the motor and this loop will go on. 

As a result, the machine is being rotated without any energy input after initiation. Now this state of the machine working without any energy input is known as a perpetual motion machine of the first kind.

Conclusion

Perpetual motion machine is just a theoretical explanation that breaks the first and second law of thermodynamics and is impossible in real life. The concept of Perpetual motion machines dates back to middle age and it was unclear whether it was possible. But the law of thermodynamics stated that it is impossible and despite this statement, many attempts were made to construct perpetual motion machines. We also discussed perpetual motion machines and the theory of how you can construct them. 

faq

Frequently Asked Questions

Get answers to the most common queries related to the JEE Examination Preparation.

What are perpetual motion machines of the first kind?

Ans. The perpetual motion machine is the machine that violates the law of thermodynamics and can supply mechanical w...Read full

How many perpetual motion machines are there?

Ans. There are three main types of perpetual motion machines: first, second or third.   &...Read full

Is it possible to construct a perpetual motion machine?

Ans. No, it is not possible to construct a perpetual motion machine, but things can be engineered to mimic or approx...Read full

Which machine is considered closest to the theory of perpetual motion machines?

Ans. The Beverly clock is one of the world’s most extensive experiments and is the closest to a perpetual moti...Read full

What is a closed system in a perpetual motion machine?

Ans. A closed system in a perpetual motion machine does not allow any transfer of matter in and out of the system an...Read full

Ans. The perpetual motion machine is the machine that violates the law of thermodynamics and can supply mechanical work continuously without the consumption of any energy.

Ans. There are three main types of perpetual motion machines: first, second or third.

 

 

Ans. No, it is not possible to construct a perpetual motion machine, but things can be engineered to mimic or approximate it.

Ans. The Beverly clock is one of the world’s most extensive experiments and is the closest to a perpetual motion machine.

 

 

Ans. A closed system in a perpetual motion machine does not allow any transfer of matter in and out of the system and it is a system that is completely isolated from the surroundings.

Crack IIT JEE with Unacademy

Get subscription and access unlimited live and recorded courses from India’s best educators

  • Structured syllabus
  • Daily live classes
  • Ask doubts
  • Tests & practice
Learn more

Notifications

Get all the important information related to the JEE Exam including the process of application, important calendar dates, eligibility criteria, exam centers etc.

Allotment of Examination Centre
JEE Advanced Eligibility Criteria
JEE Advanced Exam Dates
JEE Advanced Exam Pattern 2023
JEE Advanced Syllabus
JEE Application Fee
JEE Application Process
JEE Eligibility Criteria 2023
JEE Exam Language and Centres
JEE Exam Pattern – Check JEE Paper Pattern 2024
JEE Examination Scheme
JEE Main 2024 Admit Card (OUT) – Steps to Download Session 1 Hall Ticket
JEE Main Application Form
JEE Main Eligibility Criteria 2024
JEE Main Exam Dates
JEE Main Exam Pattern
JEE Main Highlights
JEE Main Paper Analysis
JEE Main Question Paper with Solutions and Answer Keys
JEE Main Result 2022 (Out)
JEE Main Revised Dates
JEE Marking Scheme
JEE Preparation Books 2024 – JEE Best Books (Mains and Advanced)
Online Applications for JEE (Main)-2022 Session 2
Reserved Seats
See all

Related articles

Learn more topics related to Physics
Zinc-Carbon Cell

The battery you use every day in your TV remote or torch is made up of cells and is also known as a zinc-carbon cell. Read on to know more.

ZEROTH LAW OF THERMODYNAMICS

Read about the Zeroth law of thermodynamics. Learn about the zeroth law definitions and their examples.

Zener Diode As A Voltage Regulator

Understand the concepts of Zener diodes. Also, learn about the efficiency and limitations of Zener Diode as a Voltage Regulator.

Zener diode as a voltage regulator

zener diode is a very versatile semiconductor that is used for a variety of industrial processes and allows the flow of current in both directions.It can be used as a voltage regulator.

See all
Access more than

10,505+ courses for IIT JEE

Get subscription

Trending Topics

  • JEE Main 2024
  • JEE Main Rank Predictor 2024
  • JEE Main Mock Test 2024
  • JEE Main 2024 Admit Card
  • JEE Advanced Syllabus
  • JEE Preparation Books
  • JEE Notes
  • JEE Advanced Toppers
  • JEE Advanced 2022 Question Paper
  • JEE Advanced 2022 Answer Key
  • JEE Main Question Paper
  • JEE Main Answer key 2022
  • JEE Main Paper Analysis 2022
  • JEE Main Result
  • JEE Exam Pattern
  • JEE Main Eligibility
  • JEE College predictor
combat_iitjee

Related links

  • JEE Study Materials
  • CNG Full Form
  • Dimensional Formula of Pressure
  • Reimer Tiemann Reaction
  • Vector Triple Product
  • Swarts Reaction
  • Focal length of Convex Lens
  • Root mean square velocities
  • Fehling’s solution
testseries_iitjee
Subscribe Now
. document.querySelector('.targetTopBtn').onClick = topFunction; function topFunction() { window.scrollTo({ top: 0, behavior: 'smooth' }) }
Company Logo

Unacademy is India’s largest online learning platform. Download our apps to start learning


Starting your preparation?

Call us and we will answer all your questions about learning on Unacademy

Call +91 8585858585

Company
About usShikshodayaCareers
we're hiring
BlogsPrivacy PolicyTerms and Conditions
Help & support
User GuidelinesSite MapRefund PolicyTakedown PolicyGrievance Redressal
Products
Learner appLearner appEducator appEducator appParent appParent app
Popular goals
IIT JEEUPSCSSCCSIR UGC NETNEET UG
Trending exams
GATECATCANTA UGC NETBank Exams
Study material
UPSC Study MaterialNEET UG Study MaterialCA Foundation Study MaterialJEE Study MaterialSSC Study Material

© 2026 Sorting Hat Technologies Pvt Ltd

Unacademy
  • Goals
    • AFCAT
    • AP EAMCET
    • Bank Exam
    • BPSC
    • CA Foundation
    • CAPF
    • CAT
    • CBSE Class 11
    • CBSE Class 12
    • CDS
    • CLAT
    • CSIR UGC
    • GATE
    • IIT JAM
    • JEE
    • Karnataka CET
    • Karnataka PSC
    • Kerala PSC
    • MHT CET
    • MPPSC
    • NDA
    • NEET PG
    • NEET UG
    • NTA UGC
    • Railway Exam
    • SSC
    • TS EAMCET
    • UPSC
    • WBPSC
    • CFA

Share via

COPY