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Transformers (1 Viewer)

Rhinoz8142

Rhinoz8142

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Why does a transformer work on AC but not DC
 
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QZP

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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

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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.
 
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