A 20 turns iron cored inductor is connected to a 100 V, 50 Hz source. The maximum flux density in the core is 1 wb/m2. The cross-sectional area of the core in the transformer is

1
0.155 m2
2
0.225 m2
3
0.022 m2
4
0.35 m2
5
0.70 m2

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