Question

A coil having 2000 number of turns is wound on a steel core as shown in figure Q3. Relative permeability of the steel is 250. Mean length lƩ of the core excluding air gap is 160 cm. Air gap has a height of 25.5 cm. A square loop having 20 turns and side length of 25 cm is placed in the air gap. Initially (t=0), the loop is in a vertical position (loop area is perpendicular to the cross section of the air gap). The loop is then rotated at an angular velocity of 314 rad/s in anticlockwise direction using an external force. The rotation axis of the loop goes at the mid points of two sides of the coil and perpendicular to the paper. When the coil is connected to a DC source, it is observed that an emf is induced in the loop.

Answer 1

Answer:

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