Answer to Question 7

 

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A coil has 500 turns and is known to have an inductance of 0.35 H. 

(a)  Calculate the reluctance.

(b) Calculate the flux if the current is 100 mA.

 Formula:

(a) S = (500 turns)2  0.35 H = 7.1 105 H-1

 

(b) F = NI/S = (500 turns 0.10 A)   7.1 105 H-1 = 7.0 10-5 Wb