Galvanometer Iron Battery Figure 23.3 Faraday's apparatus for demonstrating that a magnetic field can produce a current. A change in the field produced by the top coil induces an emf and, hence, a current in the bottom coil. When the switch is opened and closed, the galvanometer registers currents in opposite directions. No current flows through the galvanometer when the switch remains closed or open.
Galvanometer Iron Battery Figure 23.3 Faraday's apparatus for demonstrating that a magnetic field can produce a current. A change in the field produced by the top coil induces an emf and, hence, a current in the bottom coil. When the switch is opened and closed, the galvanometer registers currents in opposite directions. No current flows through the galvanometer when the switch remains closed or open.
Chapter8: Electromagnetism And Em Waves
Section: Chapter Questions
Problem 3C
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How do the multiple-loop coils and iron ring in the version of Faraday’s apparatus shown enhance the observation of induced emf?
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