A magnetic field is created A. when a compass is placed next to a wire
B. when wire is twisted into a loop
C. when an electric current flows through a wire
D. when wire is wrapped around an iron core

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl