In: Electrical Engineering
Select the correct answer:
1.One of the following is the origin of a magnetostatic field:
a. 2 electric charges
b. direct current on a wire
c. constant electric field
d. disc loaded
2. It is known that the self-induced electromotive force in a long selenoid, through which a variable current flows with time, depends on the factors that are described below, indicating which is the most influential:
a. the number of turns
b. the length of the selenoid
c. current variation