मराठी

State the Principle of Transformer Working with the Help of a Diagram

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प्रश्न

State the principle of transformer working with the help of a diagram

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उत्तर

It works on the principle of mutual induction. Here, a changing alternating current in primary coil produces a changing magnetic field, which, in turn, induces a changing alternating current in the secondary coil.

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2015-2016 (March) Delhi Set 1

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

State the principle on  which transformer works.


Express the turn ratio in terms of voltages.


What is the function of a transformer in an a.c. circuit? How do the input and output powers in a transformer compare?


Describe briefly, with the help of labelled diagram, working of a step-up transformer.

A step-up transformer converts a low voltage into high voltage. Does it not violate the principle of conservation of energy? Explain.


Copy the given diagram of a transformer and complete it. Name the parts A and B. Name the part you have drawn to complete the diagram. What is the material of this part? Is this transformer a step-up or step-down? Give reason.


Describe the construction and working of a transformer with a neat labelled diagram.


A transformer is essentially an a.c. device. It cannot work on d.c. It changes alternating voltages or currents. It does not affect the frequency of a.c. It is based on the phenomenon of mutual induction. A transformer essentially consists of two coils of insulated copper wire having different numbers of turns and wound on the same soft iron core.

The number of turns in the primary and secondary coils of an ideal transformer is 2000 and 50 respectively. The primary coil is connected to a main supply of 120 V and secondary coil is connected to a bulb of resistance 0.6 Ω.

Power in primary coil is ______.


Name one electrical device which works on Faraday's law of electromagnetic induction principle.


Magnetic flux Φ in weber in a closed circuit of resistance 10Ω varies with time Φ (sec) as Φ = 6t2 - 5t + 1. The magnitude of induced current at t = 0.25s is ______.


Magnetic flux passing through a coil is initially 4 × 10-4 Wb. It reduces to 10% of its original value in t second. If the emf induced is 0. 72 mV then t in second is ______.


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