Transformers (1 Viewer)

[Rhinoz8142]

Why does a transformer work on AC but not DC

 

[QZP]

AC allows for the secondary coils to experience a changing magnetic flux (since AC is always fluctuating), thus inducing emf --> current. DC dun do dis.

 

[bongoli]

Faraday's law of electromagnetic induction relies on a CHANGING magnetic field to induce voltage. Remember AC currents are constantly fluctuating thus allowing a voltage in the secondary coil. Since DC currents in a coil produce steady magnetic fields, (flow in one direction/conventional current), it would not be useful at all and also it would not induce a voltage.