AC Generator
AC Generator
An electric generator is used to convert mechanical energy to electrical energy.
Principle: It is based on the principle of electromagnetic induction. It is used to produce electric current by varying magnetic field through a coil.
Parts of Electric Generator: The difference parts of electric generator are explained as below:
1. Armature It is a coil having large number of turns of insulated copper wire wound over a soft iron core.
2. Field Magnet: It is a powerful magnet that provides a uniform magnetic field perpendicular to the axis of rotation of coil between the North and South poles.
3.Slip rings: In an AC generator, we use slip rings that is full rings with which the ends of coil are in contact. DC generator uses split ring type commutator-half rings with which the ends of the armature coil are in contact.
4. Brushes There are two stationary metallic carbon brushes which are in contact with external device and rings.
Types of Electric Generator: Electric generators are of two types:
1. Alternating Current generator (AC generator)
2. Direct Current generator (DC generator)
AC Generator:
It generates the current which changes its direction after equal intervals of time, i.e. alternating current.
Construction: An AC generator consists of a rectangular armature coil (ABCD) placed in a region of strong magnetic field (between the two poles of a permanent magnet). It experiences a torque due to the forces acting on it and produces a current. The two slip rings P and Q maintain contact of the coil with the load resistor through brushes X and Y without resistor being moved.
Working: As the coil rotates, two rings attached with it also rotate . The brushes X and Y keep the contact with the rotating ring P and Q when the coil starts rotating with arm AB moving downwards and CD moving upwards (anti-clockwise) cutting the magnetic lines.
According to Fleming's right hand rule, current is induced in these arms in the direction ABCD. After half rotation, arc CD moves downwards and AB moves upwards. As a result, the direction of current in each segment changes giving rise to net induced current in the direction DCBA. Thus, after every half rotation, polarity of current in the respective arm changes thereby generating an alternating current.
Magnitude of induced emf in a generator can be increased by
1. Increasing the number of turns of armature.
2. Increasing the area of the armature.
3. Increasing the speed of rotation of the armature.
4. Increasing the strength of the magnetic field.
If the coil is placed perpendicular to field lines then the number of lines passing through the coil is ________________ | |||
| Right Option : B | |||
| View Explanation | |||
Which of the following is not a consumer of electrical energy? | |||
| Right Option : A | |||
| View Explanation | |||
AC generator is based on the principle of __________________ induction. | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [20]
Abhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
Aman Kumar Shrivastava
10thA marvelous experience with Abhyas. I am glad to share that my ward has achieved more than enough at the Ambala ABHYAS centre. Years have passed on and more and more he has gained. May the centre flourish and develop day by day by the grace of God.
Archit Segal
7thThird consective year,my ward is in Abhyas with nice experience of admin and transport support.Educational standard of the institute recumbent at satisfactory level. One thing would live to bring in notice that last year study books was distributed after half of the session was over,though study ...
Ayan Ghosh
8thBeing a parent, I saw my daughter improvement in her studies by seeing a good result in all day to day compititive exam TMO, NSO, IEO etc and as well as studies. I have got a fruitful result from my daughter.
Prisha Gupta
8thIt was good as the experience because as we had come here we had been improved in a such envirnment created here.Extra is taught which is beneficial for future.
Eshan Arora
8thIt has a great methodology. Students here can get analysis to their test quickly.We can learn easily through PPTs and the testing methods are good. We know that where we have to practice
Barkha Arora
10thMy experience with Abhyas Academy has been very good. When I was not in Abhyas whenever teacher ask questions I could not speak it confidently but when I came in Abhyas, my speaking skills developed and now I am the first one to give the answer of teachers question.
Upmanyu Sharma
7thAbhyas is an institute of high repute. Yogansh has taken admission last year. It creates abilities in child to prepare for competitive exams. Students are motivated by living prizes on basis of performance in Abhyas exams. He is satisfied with institute.
Yogansh Nyasi
7thMy experience with Abhyas academy is very nice or it can be said wonderful. I have been studying here from seven class. I have been completing my journey of three years. I am tinking that I should join Abhyas Academy in tenth class as I am seeing much improvement in Maths and English
Hridey Preet
9thIt was a good experience with Abhyas Academy. I even faced problems in starting but slowly and steadily overcomed. Especially reasoning classes helped me a lot.
Cheshta
10thAbhyas is a complete education Institute. Here extreme care is taken by teacher with the help of regular exam. Extra classes also conducted by the institute, if the student is weak.
Om Umang
10thAbhyas is good institution and a innovative institute also. It is a good platform of beginners.Due to Abhyas,he has got knoweledge about reasoning and confidence.My son has improved his vocabulary because of Abhyas.Teacher have very friendly atmosphere also.
Manish Kumar
10thI have spent a wonderful time in Abhyas academy. It has made my reasoning more apt, English more stronger and Maths an interesting subject for me. It has given me a habbit of self studying
Yatharthi Sharma
10thAbhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
Shreya Shrivastava
8thAbout Abhyas metholodology the teachers are very nice and hardworking toward students.The Centre Head Mrs Anu Sethi is also a brilliant teacher.Abhyas has taught me how to overcome problems and has always taken my doubts and suppoeted me.
Shreya Shrivastava
8thThe experience was nice. I studied here for three years and saw a tremendous change in myself. I started liking subjects like English and SST which earlier I ran from. Extra knowledge gave me confidence to overcome competitive exams. One of the best institutes for secondary education.
Aman Kumar Shrivastava
10thMy experience with Abhyas is very good. I have learnt many things here like vedic maths and reasoning also. Teachers here first take our doubts and then there are assignments to verify our weak points.
Shivam Rana
7thAbhyas Methodology is very good. It is based on according to student and each child manages accordingly to its properly. Methodology has improved the abilities of students to shine them in future.
Manish Kumar
10thIn terms of methodology I want to say that institute provides expert guidence and results oriented monitering supplements by requsite study material along with regular tests which help the students to improve their education skills.The techniques of providing education helps the students to asses...
Aman Kumar Shrivastava
10thOne of the best institutes to develope a child interest in studies.Provides SST and English knowledge also unlike other institutes. Teachers are co operative and friendly online tests andPPT develope practical knowledge also.
