The entire device is made of sheet steel. The coil has 2,000 turns. The armature is stationary so that the length of the air gaps, g=10mm, is fixed. A direct current passing through the coil produces flux density of 1.2 T in the gaps. assumeπr=4,000 for sheet steel. Determine

a. The coil current.

b. The energy stored in the air gaps.

c. the energy stored in the steel.

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