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In a secondary coil of a step up transformer:

In a secondary coil of a step up transformer: Correct Answer <span style=" ">more turns of thin wire</span>

CONCEPT:​

  • Transformer: An electrical device that is used to transfer electrical energy from one electrical circuit to another is called a transformer.
    • In a transformer, there are two coils- Primary coil (P) and secondary coil (S).

There are two types of transformer:

  • Step-up transformer: The transformer which increases the potential is called a step-up transformer.
    • The number of turns in the secondary coil is more than that in the primary coil.
  • Step-down transformer: The transformer which decreases the potential is called a step-down transformer.
    • The number of turns in the secondary coil is less than that in the primary coil

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EXPLANATION:

Power (P) is given by
P = V I

  • As the thickness of the wire increases, the resistance of the wire decreases, and hence the electric current increases.
  • In the step-up transformer, the voltage is more in the secondary coil compared to the primary coil. As the voltage is more so the current should be less in the secondary coil according to the formula of power for constant power.
  • For less current, the thickness of the wire must be less.
  • So the wire will be thin.
  • Thus In a secondary coil of a step-up transformer, there will be more turns of thin wire as compared to the primary coil. Hence option 2 is correct.

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