Explain primary winding and a secondary winding- transformer, Physics

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The current transformer has a single turn on the primary winding and a secondary winding of 60 turns.

The secondary winding is connected to an ammeter with a resistance of 0.15Ω. The resistance of the secondary winding is 0.25Ω. If the current in the primary winding is 300A,

Determine

(a) The reading on the ammeter,

(b) The potential difference across the ammeter and

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