What evidence exists that an electric current produces a magnetic field? What evidence exists that a changing magnetic field produces an electric current?

Develop two hypotheses to test the questions.

Asample of a gaseous substance changes into a liquid

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

When you jump from an elevated position you usually bend your knees upon reaching the ground. by doing this, you make the time of the impact about 10 times as great as for a stiff-legged landing. in this way the average force your body experiences is a) less than 1/10 as great. b) more than 1/10 as great. c) about 1/10 as great. d) about 10 times as great.