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Question 4.15: A transformer has 2,000 primary turns and 120 secondary turn......

A transformer has 2,000 primary turns and 120 secondary turns. If the primary is connected to a 220 V r.m.s. a.c. mains supply, determine the secondary voltage.

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Rearranging \frac{V_P}{V_S}  =  \frac{N_P}{N_s} gives:

V_{S}={\frac{N_{S}\times V_{P}}{N_{P}}}={\frac{120\times220}{2,000}}=13.2\,\mathrm{V}

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