Use this link for the simulation ( magnet-and-compass_en.jnlp ) -select the \"Tr

Question

Use this link for the simulation (magnet-and-compass_en.jnlp) -select the "Transformer" tab at the top of the window. Make sure you click on "Reset All" button. Check your settings against those shown in the figure in step #10. For these questions, we will denote the loop with the battery as "loop 1" and the loop with the light bulb as "loop 2."

Figure 10

Why does moving loop 1 toward or away from loop 2 induce a current in loop 2?

C. The steady current in loop 1 will induce a current in loop 2 regardless of the fact that loop 1 moves toward or away from loop 2.

A. As the battery in loop 1 gets closer to loop 2, current will flow from loop 1 to loop 2. B. The magnetic field created by the current in loop 1 changes as the loops get closer. This leads to a change in the magnetic flux through loop 2 and thus to an induced emf in loop 2.

C. The steady current in loop 1 will induce a current in loop 2 regardless of the fact that loop 1 moves toward or away from loop 2.

Explanation / Answer

according to faraday's law:

"a law stating that when the magnetic flux linking a circuit changes, an electromotive force is induced in the circuit proportional to the rate of change of the flux linkage"

hence option B is correct.

"The magnetic field created by the current in loop 1 changes as the loops get closer. This leads to a change in the magnetic flux through loop 2 and thus to an induced emf in loop 2."

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