The primary winding of the step-up transformer has 80 turns, and the secondary is 1280.

The primary winding of the step-up transformer has 80 turns, and the secondary is 1280. The voltage at the ends of the primary winding is 120 V, and the current in the secondary winding is 0.25 A. Determine the useful power of the transformer?

To calculate the value of the useful power of the specified transformer, we use the formula: Pt = Uv * Iv = Up * Nv / Np * Iv.

Variables: Uп – voltage at the ends of the primary winding (Uп = 120 V); Nv – turns of the secondary winding (Nv = 1280 pcs.); Nп – turns of the primary winding (Nп = 80 pcs.); Iv – current in the secondary winding (Iv = 0.25 A).

Calculation: Pт = Up * Nv / Np * Iv = 120 * 1280/80 * 0.25 = 480 W.

Answer: The net power of the specified transformer is 480 W.