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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.
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.
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.
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.
Summary notes, revision videos and past exam questions by topic for CAIE IGCSE Physics Topic 4 - Electricity and Magnetism.
Read the Inductance and Self-Induction physics tutorial and build your physics knowledge of Magnetism. Magnetism Revision Notes: Inductance and Self-Induction. Print the notes so you can revise the key points covered in the physics tutorial for Inductance and Self-Induction.
Induced EMF. By combining Faraday’s law and Lenz’s law, an equation can be formed to calculate the induced EMF: \epsilon = -N \dfrac{\Delta \Phi}{\Delta t} \epsilon is the induced EMF in volts \left(\text{V}\right). N is the number of turns on the coil. \Delta \Phi is the change in magnetic flux in Webers \left(\text{Wb}\right).
