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Question

What would happen if a transformer is connected to a DC supply?


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Solution

A transformer is connected to a DC supply:

  1. When a DC voltage is applied to the transformer's primary coil, a constant current results in constant flux.
  2. In the primary circuit, the induced EMF will be zero.
  3. The flux produced is inversely proportional to the frequency of the DC voltage, which has no frequency.
  4. The transformer core saturates as a result of this.
  5. The extra current is short-circuited by the transformer's primary coil.
  6. The transformer may be blown away as a result of this.
  7. As a result, the transformer should never be connected to DC rather than AC.
  8. In the magnetic environment, any change of the coil of wire will cause a voltage (emf) to be induced in the coil.

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