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in Physics by (69.9k points)

Copy the given diagram of a transformer and complete it. Name the parts A and B. Name the part you have drawn to complete the diagram. What is the material of this part? Is this transformer a step-up or stepdown? Give reason.

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The completed diagram is given below: 

The part A is called primary coil. The part B is called secondary coil. The part drawn is called core. The material of core is soft iron. 

(i) This transformer is step-down since it has more turns in primary coil than in secondary coil. 

(ii) A step-up transformer has more turns in secondary coil as compared to that in primary coil, while a step-down transformer has more turns in primary coil as compared to that in secondary coil.

(iii) In a step-up transformer the wire in the primary coil is thicker as compared to that in secondary coil, while in a step down transformer the wire in secondary coil is thicker as compared to that in primary coil.

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