Give two points of difference between a step-up and a step-down transformer.

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Solution

Step up transformer Step down transformer

It increases the A.C voltage and decreases the current. It decreases the A.C voltage and increases the current.

The wire of primary coil is thicker than that in the secondary coil. The wire in the secondary coil is thicker than that in the primary coil.

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Name the coil of which the wire is thicker in a (i) step up, (ii) step down transformer. Give a reason for your answer.

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Step up transformer	Step down transformer
It increases the A.C voltage and decreases the current.	It decreases the A.C voltage and increases the current.
The wire of primary coil is thicker than that in the secondary coil.	The wire in the secondary coil is thicker than that in the primary coil.