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A current is induced in a circular loop of radius 1.5 cm between two poles of a horseshoe electromagnet when the current in the electromagnet is varied. The magnetic field in the area of the loop is perpendicular to the area and has a uniform magnitude.
The basic process of generating currents with magnetic fields is called induction; this process is also called magnetic induction to distinguish it from charging by induction, which uses the electrostatic Coulomb force.
Electromagnetic Induction Questions. The process of electromagnetic induction generates a voltage or Electromotive Force (EMF) across the electrical conductor due to a changing magnetic field. Electromagnetic induction is generally referred to as induction.
Questions and model answers on 20.2 Electromagnetic Induction for the CIE A Level Physics syllabus, written by the Physics experts at Save My Exams.
Dragging a wire through a magnetic field can make a current. Changing the magnetic flux through a circuit can make a current. This is electromagnetic induction.
Inductance and Self-Induction Revision Questions 1) What is the magnitude of the self-induced emf in a 200 mH coil if the current changes steadily from 5A to 20A in 0.02s? 15 V
Electromagnetic Induction. As the conductor cuts through the magnetic field lines, it causes a change in magnetic flux which causes work to be done. This energy is transformed to electrical energy, causing a current to be induced. Importantly, this process can be harnessed in transformers and generators. This phenomenon can be shown experimentally:
