The ring shaped core is made of material having a relative permeability of 1000. The ring consists of three sections. Section -I of length 15 cm and 3 cm² of cross sectional area. Section-II of length 10 cm and 4 cm² cross sectional area and section- III of 20 cm length and cross sectional area of 2 cm². If the flux density in the smallest cross sectional area is 2 Tesla and the current through the coil is 1.2 Ampere, compute the number of turns of the coil.
Answer:
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