Why will transformers not operate on direct current?

Question

Please reply today, its for an exam next Tuesday.

Answer 1

Transformers, which do not cross the wires between primary and secondary lines, create a magnetic field around the coils. The magnetic field from the primary crosses the wires of the secondary line. Which pushes the electrons a little. In a direct current, this pushes it just once and that's it. But in an alternating current, each time the direction of the primary coil changes, the magnetic field flips (between N & S), which pushes the electrons in the secondary coil a different direction. Each time the primary coil direction flips, so does the secondary coil, inducing a current there, too. For more info, check out

Answer 2

A transformer works because a collapsing magnetic field excites a current in the output wires. The magnetic field connected with a direct current does not collapse while an alternating current collapses and builds about 60 times per second.

Answer 3

According to Faraday's law an electrical current is induced by a changing magnetic field. An AC current through the first cicuit generates a changing magnetic field in the tranformer, because the current is constantly changing sign. This field will then create a currrent in the second circuit. But in a DC circut, one the first current reaches a constant value, the magnetic field will stop changing, and no current will be generated in the second circuit.

Answer 4

The basic explanation is that only a CHANGING magnetic field induces an electric field. The electric field then inducse the voltage and current in the secondary coil of the transformer.

A direct current in the primary of the transformer only creates a static magnetic field. (Once you wait a bit after turning it on).
This static magnetic field does not induce an electric field in the secondary.

Answer 5

Yeah, as bulbs do not care even if that's AC or DC The accepted incandescent ones did not care so it rather relies upon on the ballast. It does not say it must be AC or DC so that you ought to be sturdy.