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## Homework Statement

The Mag FLux Density in the core of a 4.4kVA 440V/4400V step up TX is 0.8T (rms). If the induced emf per turn is 10V, find: a) the primary and secondary turns, b) The cross sec area of the core, c) the full load current in each winding.

## Homework Equations

## The Attempt at a Solution

part a isnt hard, as this question is in a chapter dealing with ideal transformers and so The total emf induced is the same as the applied voltage. The Number of primary turns can therefore be deduced by;

Total emf induced/emf per turn = 440/10 = 44 turns in primary,

this can then be done again for the secondary and the resulting value for number of secondary turn is 440.

For the third part, I believe that the primary current = VA/V1 = 4400VA /440V = 10A, anf the secondary current = VA/V2 = 4400VA / 4400V = 1A. This would make sense based on all the above calculations for turns etc.

I would like some help with the second part of the equation, as i cannot understand how it can be solved using the emf equations for a single phase transformer, as there is no frequency given??

Thanks