what is transformer state its principle explain its working with construction derive an expression for EMF current in terms of number of turns in primary and secondary coil
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transformer is a device by which the magnitude of an alternating EMF can be e increased or decrease.
principle is mutual induction.
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Explanation:
A transformer works on the principle that Whenever the magnetic flux linked with a coil changes, an emf is induced in the neighbouring coil. Construction : It consists of two coils primary (P) and secondary (S), insulated from each other and Wound on a soft iron core as shown in the figure below
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