Can a transformer work when it is connected to d.c. source ?

Open in App

Solution

If DC supply is given to the primary coil of Transformer then DC current flows through primary winding which is constant (time invarient). For production of emf in any winding, the current flowing through that must be sinusoidal.
Induced emf $E = L \times (d I / d t)$ .
So in the given case ie, for DC input, no emf produced in primary winding. So net voltage in the primary winding will be (Vin-0) more due to which primary winding draws more current which leads to burning of winding.

Suggest Corrections

Similar questions

Name the principle on which a transformer works. Can a transformer work when connected to a D.C. source?

The given diagram shows an electron gun of a hot cathode ray tube.

A 6 V dc source and a 1000 V dc source are available. To obtain a focused beam of fast moving electrons the 6 V and 1000 V sources should be utilized such that

Q. A 50 Hz, single phase transformer draws a short-circuit current of 30 A at 0.2 pf lag when connected to 16 V, 50 Hz source. The short-circuit current when same transformer is energized from 16 V, 25 Hz source is ______A.

Q. Write the principle and working of a step up transformer can it be used to step up DC voltage ? Justify your answer .

Q. The self inductance of a choke coil is

10 m H

. When it is connected with a

10 V

DC source, then the loss of power is

20 W

. When it is connected with

10 V A C

source loss of power is

10 W

. The frequency of

A C

source will be

Join BYJU'S Learning Program