If the primary coil of a transformer were connected to a direct current power source...?

Question

...would the transformer work?

Answer 1

No, a transformer (nested inductors exchanging energy via changing B-fields) only works on AC. Ease of transformation is a primary reason we use AC power.

Answer 2

The transformer will produce an induction current in the secondary winding when the magnetic field changes.
The magnetic field will change when the DC power is initially applied and again when the DC power is cut and collapses.
As long as the DC is applied steady, there will be no changing magnetic field and, hence, no induced voltage in the secondary windings.
Note: It is too simplistic to just flatly say "no" because a coil in an automobile, for instance, creates a very high voltage for the spark plugs from a DC power source which is turned on and off in relation to the engine speed. This creates a pulsating DC which, in turns, creates a building and collapsing field in the primary of the coil.

Answer 3

No, not really.

At T=0 (when the DC voltage is applied) the current will change from 0 to a steady state value. While it is changing a current will flow in the secondary (assuming the secondary circuit is closed). When the steady state current is reached (when the current equals the applied voltage divided by the DC resistance of the primary). the secondary current will have gone to zero.

Answer 4

reducing the transformer could separate the ferromagnetic middle into 2 halves, putting air into the magnetic direction. The self-inductance of the everyday coil could shrink very much (on the order of a million/1000), and intense present day could pass as a effect. i could anticipate the everyday coil to deplete in short order.

Answer 5

NO........the feild effect building & collapsing within the coil is what induces the voltage in the secondary..
you can make it work by having the dc power hooked up through a relay so it becomes an interupted supply.....

Answer 6

Yes, it would but it would not be the best because the current cannot flow in both directions.