Question

In: Electrical Engineering

Select the correct answer: 1.One of the following is the origin of a magnetostatic field:   ...

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

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