## Transformer Construction

WHY in step up transformer, the number of turns are less in primary and copper wire is thick. Whereas in secondary number of turns are more and copper wire is thin.

In step-down transformer the situation is reversed.

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 Mentor Fewer turns -> lower voltage -> higher current at the same power -> thicker cables required
 For in step up transformer, the frequency of the A.C. Voltage induced in the secondary has the frequency as that of the voltage in primary-----confusing why?

Mentor

## Transformer Construction

Why do you expect the frequency to change?
The magnetic field oscillates with the same frequency as the coils - they cannot have a different frequency.
 how the voltage be increase in step up transformer?
 Mentor More turns -> higher voltage Those two are proportional to each other.
 Your mean that more turn --> more resistance --> from v = IR --> more voltage ?

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 Quote by Hardik Batra For in step up transformer, the frequency of the A.C. Voltage induced in the secondary has the frequency as that of the voltage in primary-----confusing why?
How could it be a different frequency? 1. What possible mechanism could cause it and.
2. Which frequency would it choose to be?

What's confusing about that, if the only conclusion must be that it's the same.

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