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E & TC Blog


1. What the industry Expects From Fresh Recruits?


Electronics and Telecommunication department of Pimpri Chinchwad Polytechnic, the best polytechnic in Pimpri Chinchwad invited Mr.Pankaj Shah as a guest for delivering a lecture on “What the industry wants”. Mr. Pankaj shah gave some important points to students for getting jobs in Industry and He shared his personal experience from student to become a successful Entrepreneur.


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Students of Pimpri Chinchwad polytechnic (E & Tc dept) attending Guest Lecture


Communication Skills:


An engineer must possess good communication skills if he expects to be hired into a good firm or organasation. All the complicated theories and laws are of no use if the candidate can not communicate his thoughts in proper words.


Knowledge Beyond the Textbooks:


Very often,the firms and organizations look for individuals who can go beyond the books and think brightly. You need to be logical and think intellectually.Restricting yourself to bookish knowledge does not make you a good engineer.The great companies are always seeking wonder brains who come up with such innovative ideas.


Ability to Lead:


While there are many engineering graduates who score well in their papers,there are very few who are true leaders.Most of the engineers today just follow the path shown by great minds of the past.Even during the interview process,you should be able to reveal your true leadership skills by your college examples.Leadership skills are sure to be counted as a plus point in engineering job interviews.


Positive Approach:


The job of an engineer is not easy.It is a path full of many challenges and you need to possess the courage to face these challenges.A positive approach is thus a must in the career of an engineering candidates for survive in the industry.


Updated with latest technology:


The greatest risk of being in the field of technology is that the technology existing now become obsolete some day.You must be prepared to upgrade your skills to match the latest in technology. An engineer is expected to be smart enough to widen his horizon of knowledge as per the latest trends.


Knowledge of Foreign Languages:


Knowledge of foreign language is always an added plus in the Knowledge of foreign is always engineering field. If you know languages, they can help deal with senior level executives in international projects.


Ability to multitask:


While focus is an important aspect in the engineering career,there is something more important than focus in the engineering career.It is the ability to multitask.An engineer may have to shoulder several responsibilities at the same time.If you have to survive in the engineering field, expand your multitasking abilities.




Mrs.Namrata P. Jangale

(E & TC Department)

(Pimpri Chinchwad Polytechnic)





2. Expert Lecture on “Internet of things”


Electronics and Telecommunication department of Pimpri Chinchwad Polytechnic, the best polytechnic in Pimpri Chinchwad invited Mr. Aniket Jambulkar and Ms. Kaveri as a guest for delivering a lecture on “ Internet of things”.


Ms. Kaveri highlighted about the meaning and importance of internet of things. She explained some examples like smart home, wearable and examples related to different areas like business, agriculture etc.


Mr. Aniket Jambulkar discussed an important aspect of IoT that you can freely and quickly bring up the IoT data when and where you need it .


Discussions regarding the future of IoT in India took place between the students and the guest. Queries were regarding the spectrum involving the devices in IoT like sensors, network, and connectivity and so on.


With his incredible knowledge he enlightened students about IoT importance in making of Digital India.


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Students of Pimpri Chichwad Polytechnic’s, E & TC department attending a Expert Lecture


Mrs.A.S.Futane

(E & TC Department)

(Pimpri Chinchwad Polytechnic)







3. How to Calculate Value of Resistor by Color Code


The resistor value can be calculated in many ways i.e by multimeter or color code or by LCR meter. Under the subject Basic Electronics and Mechtronics for Mechanical Engg Diploma college in Pimpri Chinchwad.


To calculate resistor value by color code in four band resistor , first band represents first digit. Second band represents second digit and third band multiplier and last band tolerance.


  • The first band will be closest to the lead.
  • There is a space between the color band and tolerance band .
  • Tolerance band indicates that the value of resistor can be more or less than the specified value.
  • Use following mnemonic to remember color code sequence.
  • “B. B. ROY of Great Britain had a Very Good Wife who wore Gold and Silver Necklace ”.

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Fig: Sample Color code Resistor


Example:


In the above resistor

First Band is RED(2)

Band is VIOLET(7)

Third Band is BROWN(101)

Fourth Band is Gold(± 5%)

R= 27×101ÇOhm ±5%

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Fig: Color Code table


Sarojini V. Naik

(E & TC Department)

(Pimpri Chinchwad Polytechnic)






4. IMPORTANCE OF BEHAVIOURAL SCIENCE SUBJECT


Maharashtra state board of Technical education (M.S.B.T.E, Mumbai) introduces BEHAVIOURAL SCIENCE SUBJECT in 5th semester in the curriculum for all branches.


Based on industrial survey, search conferences and feedback received from teachers, industry experts BEHAVIOURAL SCIENCE SUBJECT (17075) was introduced in G semester scheme at year 2012-2013. It was introduced to develop abilities of various styles of leadership based on situation and maturity of followers.


At Pimpri Chincwad polytechnic, one of best polytechnic in Pune where third year students developed models as a part of curriculum. This activity not only develops skill to work in a team but also develop the habit to complete the task in prescribed time.


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conceptual based Pyramid model

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showing goal achievement steps


Also apart from technical subject students also enjoyed the given task like solving Jigsaw puzzles. In this activity group of 5-6 students prepared different shapes of pieces with some theme. In sequence each member passes the pieces one by one and tried to solve the puzzle. The activity carried in E&Tc department laboratory one of best department of PimpriChinchwad Polytechnic


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Jigsaw puzzle solved in 20min

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Theme based puzzle solved in 27min.


The subject also covers various employability aspects so that third year student can take decision either to do job or to go for higher education.


As a subject teacher I have good experience to carry different activity. Student come with their innovative ideas and it build good harmony between teacher and student by having open dialogues.


Mrs V.S.KharoteChavan

(Lecturer,E & TC Department)

(Pimpri Chinchwad Polytechnic)





5. Faraday Law of Electromagnetic Induction


In 1831, Michael Faraday, an English physicist gave one of the most basic laws of electromagnetism called Faraday's law of electromagnetic induction. This law explains the working principle of most of the electrical motors, generators, electrical transformers and inductors . This law shows the relationship between electric circuit and magnetic field. Faraday performs an experiment with a magnet and coil. During this experiment, he found how emf is induced in the coil when flux linked with it changes.This law is included under the subject of Basic Electrical and Electronics for Automobile Engg Diploma college in Pimpri Chinchwad.

Faraday's Experiment

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RELATIONSHIP BETWEEN INDUCED EMF AND FLUX 

In this experiment, Faraday takes a magnet and a coil and connects a galvanometer across the coil. At starting, the magnet is at rest, so there is no deflection in the galvanometer i.e needle of galvanometer is at the center or zero position. When the magnet is moved towards the coil, the needle of galvanometer deflects in one direction. When the magnet is held stationary at that position, the needle of galvanometer returns back to zero position. Now when the magnet is moved away from the coil, there is some deflection in the needle but in opposite direction and again when the magnet becomes stationary, at that point with respect to coil, the needle of the galvanometer returns back to the zero position. Similarly, if magnet is held stationary and the coil is moved away and towards the magnet, the galvanometer shows deflection in similar manner. It is also seen that, the faster the change in the magnetic field, the greater will be the induced emf or voltage in the coil. 

CONCLUSION: From this experiment, Faraday concluded that whenever there is relative motion between conductor and a magnetic field, the flux linkage with a coil changes and this change in flux induces a voltage across a coil.

Michael Faraday formulated two laws on the basis of above experiments. These laws are called Faraday's laws of electromagnetic induction.



Faraday's Laws

Faraday's First Law

Any change in the magnetic field of a coil of wire will cause an emf to be induced in the coil. This emf induced is called induced emf and if the conductor circuit is closed, the current will also circulate through the circuit and this current is called induced current. Method to change magnetic field:

1. By moving a magnet towards or away from the coil

2. By moving the coil into or out of the magnetic field.

3. By changing the area of a coil placed in the magnetic field

4. By rotating the coil relative to the magnet.


Faraday's Second Law

It states that the magnitude of emf induced in the coil is equal to the rate of change of flux that linkages with the coil. The flux linkage of the coil is the product of number of turns in the coil and flux associated with the coil. 


Applications of Faraday Law

Faraday law is one of the most basic and important laws of electromagnetism . This law finds its application in most of the electrical machines, industries and medical field etc.

  • Electrical Transformers It is a static ac device which is used to either step up or step down voltage or current. It is used in generating station, transmission and distribution system. The transformer works on Faraday's law.
  • Electrical Generators The basic working principle of electrical generator is Faraday's law of mutual induction. Electric generator is used to convert mechanical energy into electrical energy. 
  • Induction Cookers The Induction cooker, is a most fastest way of cooking. It also works on principle of mutual induction. When current flows through the coil of copper wire placed below a cooking container, it produces a changing magnetic field. This alternating or changing magnetic field induces an emf and hence the current in the conductive container, and we know that flow of current always produces heat in it. 
  • Electromagnetic Flow Meters It is used to measure velocity of blood and certain fluids. When a magnetic field is applied to electrically insulated pipe in which conducting fluids are flowing, then according to Faraday's law, an electromotive force is induced in it. This induced emf is proportional to velocity of fluid flowing .
  • Musical Instruments It is also used in musical instruments like electric guitar, electric violin etc.




Mrs.Vrushali R.Deore

E & TC Department

Pimpri Chinchwad Polytechnic





6. Limit Your Cell Phone Radiation Exposure


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  • Exposure to cell phone radiation is a constant for most of us. Our phone is with us all the time. Cell phones emit radio-frequency (RF) energy.
  • When you hold your cell phone next to your head or wear it on your body, you can absorb over 50% of the transmitted RF energy.
  • So take precautionary steps to protect yourself and minimize your exposure
  • If you don’t have a Pong case yet, or one is not available for your particular mobile device, the following tips you can do in your daily life to help protect yourself and limit your exposure to cell phone radiation.

Avoid Body Contact

  • Follow the phone manufacturer’s warnings found in your owner’s manual and avoid using or carrying your cell phone against your head or body at all times
  • At least 10mm of space between you and your phone.
  • shouldn’t keep it in your pocket .

Text More

  • Whenever possible, text rather than talk.
  • When texting your phone will be likely held in your hand and further from your body.  
  • This distance creates a much larger buffer between you and the powerful near field radiation from the phone.

Use Speaker Mode or a Wired Headset

  • If a call must be made, use the speakerphone or a wired headset.
  • When holding the phone against your head for a call you are increasing the amount of radiation your head will be absorbing.
  • The speaker or wired headsets reduce the amount of near field radiation you are exposed to.

Shorter Calls

  • Limit the length of your cell phone conversations.
  • Less time talking with a phone against your head equals less radiation going into your body.  
  • Use a corded landline phone if available.
  • Do not use a cordless phone for long conversations.

Limit Kids Cell Phone Use Time

  • Children should only use cell phones for emergencies or strictly in speaker mode at a safe distance.
  • A child’s body is still developing and cell phone radiation penetrates a child’s brain more deeply than an adult brain.

Switch Sides of Head When Talking

  • Switch sides regularly during a cell phone call to reduce radiation exposure to just one side of your head.
  • Most of us use the same hand all the time to hold the phone when we talk.
  • Try to switch to your other hand and it will help so that one side of your head doesn’t always get all the radiation.

Avoid Use When Low Signal

  • Avoid using your cell phone when the signal is weak or when moving at high speed, such as in a car or train.
  • These cause mobile phones to increase their transmitting power in an attempt to connect to the nearest cell tower.
  • You get more radiation and your battery drains faster under these conditions.

Wait For Call Connection

  • When making a call, wait for the call to connect before placing the phone next to the ear.
  • The phone emits the most intense radiation during the initial connection, then lowers its power once a connection is established.

Use Airplane Mode

  • Turn your cell phone off or put it in airplane mode when not in use.
  • If you must leave your cell phone on at night, keep your cell phone away from your head and body while you are sleeping.
  • Your phone continues to emit radiation even when you are not making a call.

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E & TC Department

Pimpri Chinchwad Polytechnic





7. IMPORTANCE OF BEHAVIOURAL SCIENCE SUBJECT


  • Maharashtra state board of Technical education (M.S.B.T.E, Mumbai) introduces BEHAVIOURAL SCIENCE SUBJECT in 5th semester in the curriculum for all branches.
  • Based on industrial survey, search conferences and feedback received from teachers, industry experts BEHAVIOURAL SCIENCE SUBJECT (17075) was introduced in G semester scheme at year 2012-2013. It was introduced to develop abilities of various styles of leadership based on situation and maturity of followers.
  • At PimpriChincwad polytechnic, one of best polytechnic in Pune where third year students developed models as a part of curriculum. This activity not only develops skill to work in a team but also develop the habit to complete the task in prescribed time.

De Morgan's Theorems

De Morgan has suggested two theorems which are extremely useful in Boolean Algebra. The two theorems are discussed below.

Theorem 1:

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  • The left hand side (LHS) of this theorem represents a NAND gate with inputs A and B, whereas the right hand side (RHS) of the theorem represents an OR gate with inverted inputs.
  • This OR gate is called as Bubbled OR

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FIG.1: Implementation of De Morgan's first theorem.

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Table1: Verification of De Morgan’s first theorem.

Verification of De Morgan’s first theorem practically:

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Fig.2: Connection diagram to prove De Morgan’s first theorem.

Observation table for Verification of De Morgan’s first theorem:

  • Observe the outputs in above diagram and note it down in following observation table:

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Table2: Observation table for verification of De Morgan’s first theorem.

Theorem 2:

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  • The left hand side (LHS) of this theorem represents a NOR gate with inputs A and B, whereas the right hand side (RHS) of the theorem represents an AND gate with inverted inputs.
  • This AND gate is called as Bubbled AND

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FIG.1: Implementation of De Morgan's Second theorem.

Truth Table showing verification of the De Morgan's first theorem :

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Table1: Verification of De Morgan’s first theorem.

Verification of De Morgan’s first theorem practically:

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Fig.2: Connection diagram to prove De Morgan’s Second theorem.

Observation table for Verification of De Morgan’s Second theorem:

  • Observe the outputs in above diagram and note it down in following observation table:

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Table2: Observation table for verification of De Morgan’s first theorem.

Applications of De Morgan’s Theorem:

1) It can be used for simplification of logical expressions.

Ex:

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`

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And if we simplify expression using De Morgan’s theorem and implemented simplified expression Y = ABthen we will require only 3 logic gates as shown below:

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2) Thus Minimization of logic circuit using De Morgan’s theorem.

3) Reduction of the circuit cost as number of gates are reduced.





E & TC Department

Pimpri Chinchwad Polytechnic





7. RESEARCH ON GRAVITATIONAL WAVES


Three scientist, Rainer Weiss, Kip Thorne, Barry Barish have bagged Nobel prize the award (physics).These scientist were associated with LIGO project through they detected gravitational waves.

What are gravitational waves?

Gravitational waves can pass through boundaries that light cannot and can give information about every corner of universe. Light cannot escape through black holes but gravitational waves can. Fig. gravitational waves were observed during merger of two black holes in 2015.

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LIGO is a pair of L – shaped antennas that detected waves, these antennas are located in US in Hanford and Livingston.

Laser interferometer gravitational wave observatory is project with over 1000 researchers from 20 + countries.







A.V. RAIPURE

E & TC Department

Pimpri Chinchwad Polytechnic

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