हिंदी

Can a Transformer Be Used with Direct Current Source? Give Reason.

Advertisements
Advertisements

प्रश्न

Can a transformer be used with direct current source? Give reason.

टिप्पणी लिखिए
Advertisements

उत्तर

No, a transformer cannot be used with direct current source. The reason is that with direct current source, there will not be any change in the magnetic flux linked with the primary coil, so no e.m.f. will be induced in the secondary coil.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?

संबंधित प्रश्न

On which type of current do transformers work?


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.  


State the principle of working of a transformer. Can a transformer be used to step up or step down a d.c. voltage? Justify your answer.


A transformer having efficiency of 80% is working on 200 V and 6 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are ____________.


The core of transformer is laminated to reduce ______.

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

Read the following paragraph and answer the question:


Long distance power transmissions

The large-scale transmission and distribution of electrical energy over long distances is done with the use of transformers. The voltage output of the generator is stepped up. It is then transmitted over long distances to an area sub-station near the consumers. There the voltage is stepped down. It is further stepped down at distributing sub-stations and utility poles before a power supply of 240 V reaches our homes.

If the secondary coil has a greater number of turns than the primary, ______.


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?


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.


A 12 V, 60 W lamp is connected to 220 V AC via an ideal transformer. Find the primary current.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×