Question

Explain how the primary current increases as the current on the secondary side of the transformer increased.

Answer 1

Answer:

when an account voltage is connected across the primary terminal of a transformer,an alternating current Will flow.a voltage in the primary coil which is opposite and nearly equal to the applied voltage

Answer 2

Answer:

As the secondary current increases, the primary current also increases.

Explanation:

• An alternating current will flow and self-induce a voltage in the primary coil that is opposite and almost equal to the applied voltage when an ac voltage is put across a transformer's primary terminals.
• Just enough current can flow through the primary to magnetise its core thanks to the difference between these two voltages.
• By cutting across the secondary coil, the magnetic field produced by this excited current induces a voltage through mutual induction.
• If a load is placed across the secondary coil, the magnetic field created by the load current flowing through the secondary coil will tend to cancel out the magnetic field created by the primary current.
• Consequently, the primary coil's self-induced (opposition) voltage will be lower, allowing more primary current to pass.
• As the secondary load current rises, the primary current rises as well and falls as the secondary load current falls.
• The primary current is once more decreased to the tiny exciting current needed merely to magnetise the transformer's iron core when the secondary load is withdrawn.

This is how the primary current increases as the secondary current increases.

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