Question

The number of truns of primary coil and the number of turns of secondary coil in a transformer are never made equal,why?

Answer 1

Answer:

If they are same, the transformer cannot step up or step down the voltage.

Explanation:

"The number of truns of primary coil and the number of turns of secondary coil in a transformer are never made equal".

This is because the primary use of transformer is to either step up or step down the voltage. This stepping up or stepping down depends on the number of turns in primary and secondary coils. This is given by,

$\frac{np}{ns} = \frac{vp}{vs}$

If the number of turns in both coils are the same, the transformer does nothing (no step up or step down) and building it is just a waste of money.

Step up transformer increases the secondary coil voltage, thereby greatly decreasing the power loss during long distance transmission

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