Transformer) is an electromagnetic device that produces an electrical voltage proportional to the displacement of a movable Magnetic Core [pic] [pic]A COIL WINDING ASSEMBLY consisting of a Primary Coil and two Secondary Coils symmetrically spaced on a tubular center. [pic]A CYLINDRICAL CASE which encloses and protects the Coil Winding Assembly. [pic]A rod shaped MAGNETIC CORE which is free to move axially within the Coil Winding Assembly. [pic]A separate shield is used for ELECTROMAGNETIC
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reading of the galvanometer remains the same with switch S open or closed‚ then what is the value of current through galvanometer ? 1 di es IP IR P w .s to V B Q HS w A da y D C G D w R 6. 7. 8. 9. How will the magnetic field intensity at the centre of a circular coil carrying current change‚ if the current through the coil is doubled and the radius of the coil is halved ? 1 Define eddy current. What is the ratio of speed of gamma rays and radiowaves in vacuum
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Theory The physical basis of the transformer is mutual induction between two circuits linked by a common magnetic field. Transformer is required to pass electrical energy from one circuit to another‚ via the medium of the pulsating magnetic field‚ as efficiently and economically as possible. This could be achieved using either iron or steel which serves as a good permeable path for the mutual magnetic flux. An elementary linked circuit is shown in Fig.1. The principle of operation of this circuit can be
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ACKNOWLEDGEMENT It gives us great pleasure when a certain task is accomplished with great zeal and enthusiasm. We would like to extend our heartfelt thanks and deep sense of gratitude to all those who helped us in completing this project. First and foremost‚ we feel greatly indebted to Mr. D. M. SINGH and Mr. UBAID AHMAD KHAN‚ from the core of our heart for their constant support and valuable guidance time to time‚ because they encouraged and
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FUSE THEORY The energy conversion process is carried out with the help of magnetic fields. These conversion processes also result in losses to the machine. Types of Losses The losses in a three phase induction machine are broadly classified into the following types 1) Magnetic losses 2) Electrical Losses 3) Mechanical Losses Magnetic losses The presence of rotating magnetic field in the stator core results in the magnetic losses. Stator core is made up of silicon steel or iron stampings‚ these losses
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TECHNOLOGICAL INSTITUTE OF THE PHILIPPINES 938 Aurora Boulevard‚ Cubao‚ Quezon City ELECTRICAL ENGINEERING DEPARTMENT In Partial Fulfilment of the Requirements for the Degree of Bachelor of Science in Electrical Engineering and Completion of the Subject AC Apparatus and Devices with the design project entitled: A Proposed Design of 75KVA‚ 13.8KV/230 V‚ 60Hz 1ᶲ Distribution Transformer (Core Type with Cruciform Section) Submitted by: Alcantara‚ Jhonner P. Carasket‚ Runel
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piece of soft iron attached to each end of the magnet. The iron is also magnetized. The iron ends of the magnet serve to direct the magnetic field in the direction of a small iron cylinder that is positioned between the ends (or poles) of the magnet. Taking advantage of the soft iron’s characteristic to become highly magnetized‚ the iron cylinder focuses the magnetic field. The Electrical Current Surrounding the cylinder is a rectangular frame with a copper wire coil‚ with the ends of the wire attached
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of windings to which three-phase electrical power is applied. The stator field can be visualized as a set of north and south poles rotating around the circumference of the stator. (North stator poles are where magnetic flux lines leave the stator‚ and south stator poles are where magnetic flux lines enter the stator.) Because north and south poles occur in pairs‚ the total number of poles P is always even. The direction of rotation of the field in a three-phase induction machine can be reversed by
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Through research I discovered that there are animals that have senses that by far exceed our five human senses. One of the animals would be the bat that we spoke about in class. Bats avoid obstacles and nab insects on the wing by emitting ultrasonic squeaks and interpreting the echo the sound waves make after bouncing off objects in the environment. This is called "echolocation‚" but bats aren’t the only animals that use echolocation. Dolphins also use echolocation to navigate themselves in murky
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GENERAL INSTRUCTIONS: A: The numerical are based on application of theory content. Attempt them in your physics notebook as practice assignment. B: Do all questions in sequence. UNIT –I: ELECTROSTATICS 1. Three identical charges each +q are placed at the corners of an equilateral triangle of side d cm. Calculate the force on a +ve charge +2q at the centroid of the triangle. 2. Force acting on a charged particle kept between the pair of plates‚ having equal and opposite charge‚ is F. If
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