Question

The strength of the magnetic field between the poles of an electromagnet would be unchanged if :; A. current in the electromagnet winding were doubled; B. direction of current in electromagnet winding were reversed; C. Distance between the poles of electromagnet were doubled; D. material of the core of electromagnet were changed

Answer 1

Answer:

A

Explanation:

current in the electromagnet winding were doubled

Answer 2

Answer:

direction of current in the electromagnetic winding is reversed

I had the same question on my test and got it correct.