2006-10-01 07:43:15 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Physics
Well,
The transformer works on the principle of "mutual Inductance". Basically, transformer has 2 coils namely Primary & Secondary,
When alternating current is made to flow thorugh Primary, a varying magnetic filed is induced around the primary coil. this varying magnetic filed induces Voltage in the Secondary coil. this is the principle of a transformer.
Same way, when DC is made to flow in the primary, Since DC cannot produce 'varying' magnetic field around the primary coil, its not possible to pass / induce the energy in the secondary coil, thus we cannot tranform the Voltage.
so transformer needs an Alternativ voltgae for its operation.
Praful.
2006-10-01 07:52:37 · answer #1 · answered by Anonymous · 0⤊ 0⤋
The secondary winding is a fixed, non-moving coil. The only way to induce a current in the secondary is to have a moving magnetic field, which, therefore, requires the voltage on the primary to be alternating.
2006-10-01 07:52:13 · answer #2 · answered by arbiter007 6 · 1⤊ 0⤋
Transformers dont need alternating voltage. They run on "energon cubes." Isn't that why the Autobots and Decepticons are always fighting over them? haha!
Seriously, I think you mean alternating current, not alternating voltage.
2006-10-02 00:24:40 · answer #3 · answered by professorpippyppoopypants 2 · 0⤊ 1⤋
the voltage on the secondary winding is equal to the time derivative of the magnetic flux threading it.
2006-10-01 08:02:24 · answer #4 · answered by Dr. R 7 · 0⤊ 1⤋
Because the changing field is necessary for the inductance current.
2006-10-01 07:48:27 · answer #5 · answered by bruinfan 7 · 0⤊ 0⤋
Informative discussion, just what I was searching for.
2016-08-14 04:56:21 · answer #6 · answered by Anonymous · 0⤊ 0⤋