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Magnetism and Electromagnetism - Engineering

Q1:

There is 900 mA of current through a wire with 40 turns. What is the reluctance of the circuit if the flux is 400 Wb?

A 14,400 At/Wb

B 1,440 At/Wb

C 9,000 At/Wb

D 90,000 At/Wb

ANS:D - 90,000 At/Wb

In electrical circuit resistance, in magnetic circuit reluctance.
Current in electrical circuit same as in magnetic circuit is flux.
Voltage in electrical circuit same as in magnetic circuit NI or mmf (AT).
Reluctunce= NI/π unit AT/Weber.