मराठी

Mention the Two Characteristic Properties of the Material Suitable for Making Core of a Transformer.

Advertisements
Advertisements

प्रश्न

Mention the two characteristic properties of the material suitable for making core of a transformer.

Advertisements

उत्तर

Since due to iron core we have two types of losses,

1. Iron lossi.e. energy loss in the form of heat due to the induced eddy current that can be minimized by using thin laminated core.

2. Hysteresis loss due to alternately passing a current in the coil to magnetize and demagnetize the iron core. This can be reduced by using a special alloy of iron core with silicon.

So material with less iron loss and less hysteresis loss is used for making core of transformer.

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
2011-2012 (March) All India Set 1

व्हिडिओ ट्यूटोरियलVIEW ALL [3]

संबंधित प्रश्‍न

Explain why an induced current must flow in such a direction so as to oppose the change producing it.


The following diagram in Fig. 10.44 shows a coil X connected to a sensitive centre –zero galvanometer G and a coil P connected to a battery through a switch S.

(a) Describe the observation when the switch S is (i) closed suddenly, (ii) then kept closed, (iii) finally opened.
(b) Name and state the law which explains the above observations.


Describe, with the help of  a suitable diagram, the working principle of a step-up transformer. Obtain the relation between input and output voltages in terms of the number of turns of primary and secondary windings and the currents in the input and output circuits.


The input and output voltages of a transformer are 220 V and 44V respectively. Find the current in input circuit if the output current is 2 A.


Name three losses of energy in a transformer. How are they minimized?


A transformer lowers e.m.f. 220 V to 12 volts. If the number of turns in primary are 8800, how many turns are in secondary coil?


What are step-up and step-down transformers?


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


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.


The self-inductance of a closely wound coil of 200 turns is 10 mH. Determine the value of magnetic flux through the cross-section of the coil when the current passing through the coil is 4 mA.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×