The figure below is a magnetic device having a steel movable wedge located betwe

Question

The figure below is a magnetic device having a steel movable wedge located between two poles. The cross-sectional area of the left pole is twice that of the right pole. Fringing of the flux around the pole edges may be ignored. (a) What is the direction of the force on the wedge? (b) Is the force dependent on the position of the wedge if the flux is kept constant? (c) Is the force dependent on position if the current is kept constant? (d) If the area of the right pole is 100 mm^2 and both are gaps are 1 mm in length, and the coil has 200 turns, find the force for a current of 10A.

Explanation / Answer

1) the magnetic device will attract the wedge towards it

2)

No if the flux is kept constant, it doesnot depend on theposition of the wedge

3)

If the current is kept constant , it is independent of the position

4)

The force exerted =1.5N

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