हिंदी

Why is the Core of a Transformer Made of Soft Iron?

Advertisements
Advertisements

प्रश्न

Why is the core of a transformer made of soft iron?

टिप्पणी लिखिए
Advertisements

उत्तर

The core of a transformer is made of soft iron because it has high permeability, so it provides complete linkage of the magnetic flux of the primary coil to the secondary coil. Secondly, the hysteresis loss of energy in soft iron is less.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
2023-2024 (March) Official

संबंधित प्रश्न

Derive an expression for ratio of e.m.f.s and currents in terms of number of turns in primary and secondary coil.


Name two factors on which the magnitude of an induced e.m.f. in the secondary coil depends.


You are required to make an electromagnet from a soft iron bar by using a cell, an insulated coil of copper wire and a switch. (a) Draw a circuit diagram to represent the process. (b) label the poles of the electromagnet.


State two factors on which the magnitude of induced e.m.f. depend.


The secondary windings of a transformer in which the voltage is stepped down are usually made of thicker wire than the primary. Explain why.


Given the input current 15 A and the input voltage of 100 V for a step-up transformer having 90% efficiency, find the output power and the voltage in the secondary if the output current is 3 A.  


Describe briefly and two energy losses, giving the reasons for their occurrence in actual transformers ?


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.


Explain the working of the transformer.


Mention the various energy losses in a transformer.


The output power in step-up transformer used in practice is ______.


The loss of energy in the form of heat in the iron core of a transformer is ______.

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


The primary coil of a transformer has 800 turns and the secondary coil has 8 turns. It is connected to a 220 V ac supply. What will be the output voltage?


A 60 W load is connected to the secondary of a transformer whose primary draws line voltage. If a current of 0.54 A flows in the load, what is the current in the primary coil? Comment on the type of transformer being used.


In a transformer, number of turns in the primary coil are 140 and that in the secondary coil are 280. If current in primary coil is 4 A, then that in the secondary coil is ______.


A step down transformer connected to an AC mains supply of 220 V is made to operate at 11 V, 44 W lamp. Ignoring power losses in the transformer, what is the current in the primary circuit?


An ideal transformer converts 170 V a.c. to 1.70 KV a.c. to transmit a power of 3.4 KW. If primary coil has 500 turns then alternating current in secondary coil is ______.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×