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What creates a magnetic field? Choose every correct answer. (a) a stationary object with electric charge (b) a moving object with electric charge (c) a stationary conductor carrying electric current (d) a difference in electric potential (e) an electric resistor.

User Bgplaya
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The correct answers are:

(b) a moving object with electric charge
(c) a stationary conductor carrying electric current

A magnetic field is created by the motion of electric charge (option b) and by a stationary conductor carrying an electric current (option c).
User Noko
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