A step-up transformer operates on a 220 V line and supplies a current of 2 A. The ratio of primary and secondary winding is 1:25. Assuming 100% efficiency, the output power of the transformer is:

11000 W

The correct answer is Option (1) → 11000 W

Primary voltage = 220 V

Turns ratio (primary : secondary) = $1 : 25$

So secondary voltage:

$V_s = 220 \times 25 = 5500\text{ V}$

Secondary current = $2\text{ A}$

Output power:

$P_{\text{out}} = V_s \cdot I_s = 5500 \times 2 = 11000\text{ W}$

The output power of the transformer is 11000 W.