An inductor designed with 400 turns coil wound on an iron core of 16 cm2 cross sectional area and with a cut of an air gap length of 1 mm. The coil is connected to a 230 V, 50 Hz AC supply. Neglect coil resistance, core loss, iron reluctance and leakage inductance, (μ0 = 4π × 10-7 H/M)
The average force on the core to reduce the air gap will be?
n = 400 turns
cross-sectional area of coil is 16 cm2