The primary of a transformer connected to 70 V has 10 turns. The secondary has 150 turns. Find the output voltage. This is a step-up transformer.

Question

Transformer relationship: Primary voltage/Number of primary turns=secondary voltage/number of secondaryturns

Answer 1

Here the secondary coil of the transformer has 15 times as many turns as the primary coil

and operates in a 70-Volt circuit.

The voltage across the secondary coil is the output voltage in this step-up transformer.

With no difference in Flux Linkage between Coil 1 and Coil 2, the Electromotive Force Ratio

(or EMF Ratio) will equal the Turns Ratio.

Then write V_S/V_P = N_S/N_P = 15 and take V_S as 15V_P or 15(70 Volts) or 1050 Volts.