Question:
A power transmission line feeds input power at 2300 V to a stepdown transformer with its primary windings having 4000 turns. What should be the number of turns in the secondary in order to get output power at 230 V?
Answer:
Input Voltage V1 = 2300 V
no of turns in primary coil n1 = 4000
Output Voltage V2 = 230 V
no of turns in primary coil n2 = ?
V1/ V2 = n1/ n2
2300/230 = 4000/n2
n1 = 4000 x 230/ 2300 = 400
Hence there are 400 turns in the second winding.
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