Subtitle Hand Rule When from clenched Right Hand,

Subtitle 1 Working principle of GeneratorsGenerator plays a vital role in power system.Faraday’s law of electromagnetic induction forms the working principle ofelectrical generator, which states that, EMF generated in a conductor which isplaced in varying magnetic field. In a generator a uniform magnetic field isgenerated and a prime mover is employed to create uniform motion and thusproducing electricity.  Function of Generators Generatorshave many functions, the primary function being generating power. The generatedpower is transmitted by transmission line and distributed using distributionsystem. Their function also includes maintain the frequency in the grid, notmaintaining the frequency may have catastrophic effects on the grid. Subtitle 2 Laws of electromagnetic induction First Law Faraday’sfirst law states that, any change in magnetic field causes an EMF in aconductor which is placed in a magnetic field.

   Second Law Faraday’ssecond law states that the induced EMF is equal to the change in flux linkages.  Flemings Right Hand Rule When fromclenched Right Hand, thumb, index finger and middle finger are opened in such away that all three fingers are perpendicular to each other. Then, the thumbdenoted the direction of motion, Index finger denotes the direction of thefield and the middle finger denotes the direction of current. Subtitle 3 Mutual Induction  Production of EMF in coil one which ismagnetically coupled with coil two, when there is a change in current in coil twois called mutual induction. EMF produced is given byWe know that,     Transformer Voltage Ratio Transformer voltage ratio or turn’s ratio isthe ratio of number secondary turns to primary turns.

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The ratio determineswhether the transformer is either step up or step down.  Ratio is also given by the ratio of secondaryvoltage to primary voltage thus also called voltage ratio turn’s ratio or voltageratio is used for designing the Transformers. ANSWER 2