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- https://phys.libretexts.org/Courses/Muhlenberg_College/Physics_122%3A_General_Physics_II_(Collett)/09%3A_Electromagnetic_Induction/9.05%3A_Induced_Electric_FieldsThe fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery n...The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, for a battery does not have to be present in a circuit where current is induced, and magnetic fields never do work on moving charges. The answer is that the source of the work is an electric field that is induced in the wires.
- https://phys.libretexts.org/Courses/Kettering_University/Electricity_and_Magnetism_with_Applications_to_Amateur_Radio_and_Wireless_Technology/09%3A_Electromagnetic_Induction/9.06%3A_Induced_Electric_FieldsThe fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery n...The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, for a battery does not have to be present in a circuit where current is induced, and magnetic fields never do work on moving charges. The answer is that the source of the work is an electric field that is induced in the wires.
- https://phys.libretexts.org/Courses/Grand_Rapids_Community_College/PH246_Calculus_Physics_II_(2025)/09%3A_Electromagnetic_Induction/9.05%3A_Induced_Electric_FieldsThe fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery n...The fact that emfs are induced in circuits implies that work is being done on the conduction electrons in the wires. What can possibly be the source of this work? We know that it’s neither a battery nor a magnetic field, for a battery does not have to be present in a circuit where current is induced, and magnetic fields never do work on moving charges. The answer is that the source of the work is an electric field that is induced in the wires.
- https://phys.libretexts.org/Courses/Georgia_State_University/GSU-TM-Physics_II_(2212)/07%3A_Electromagnetic_Induction/7.03%3A_Induced_Electric_FieldsThe magnetic field is confined to the interior of the solenoid where B=μ0nI=μ0nI0e−αt. Thus, the magnetic flux through a circular path whose radius r is greater than R, the...The magnetic field is confined to the interior of the solenoid where B=μ0nI=μ0nI0e−αt. Thus, the magnetic flux through a circular path whose radius r is greater than R, the solenoid radius, is Φm=BA=μ0nI0πR2e−αt. The induced field →E is tangent to this path, and because of the cylindrical symmetry of the system, its magnitude is constant on the path.
