Question

For a coil having a magnetic circuit of constant reluctance, if the flux increases, what happens to the current?

(a) Increases

(b) Decreases

(c) Remains constant

(d) Becomes zero

The question was posed to me by my college professor while I was bunking the class.

My question is based upon Inductance in Terms of Flux Linkages Per Ampere topic in section Inductance in a DC Circuit of Basic Electrical Engineering

Answer 1

The correct answer is (a) Increases

To elaborate: For a coil having a magnetic circuit of constant reluctance, the flux is directly proportional to the current. Hence as the flux increases, the current also increases.