15 Questions
Who is generally credited with the discovery of electromagnetic or magnetic induction?
Michael Faraday
What is the mathematical description of electromagnetic or magnetic induction?
Faraday's law of induction
What law describes the direction of the induced field in electromagnetic induction?
Lenz's law
In Faraday's first experimental demonstration, what did he wrap around opposite sides of an iron ring?
two wires
What did Faraday call the transient current he observed when he connected and disconnected the wire to a battery in his experimental demonstration?
a 'wave of electricity'
What are the two aspects of electromagnetism?
Magnetism and electric currents
Which materials are strongly attracted by magnetic fields and can become permanent magnets?
Ferromagnetic materials
What are the main types of magnetism exhibited by substances?
Ferromagnetism, paramagnetism, diamagnetism, and antiferromagnetism
Name two examples of ferromagnetic substances.
Iron and cobalt
Which materials have a weak attraction to an applied magnetic field?
Paramagnetic substances
What are the main types of magnetism exhibited by substances?
Ferromagnetism, paramagnetism, diamagnetism, antiferromagnetism
Which materials are classified as ferromagnetic?
Iron, cobalt, nickel, and their alloys
What are the two aspects of electromagnetism?
Electric currents and magnetic moments of elementary particles
Name two examples of paramagnetic substances.
Aluminium, oxygen
What is responsible for most of the effects of magnetism encountered in everyday life?
Ferromagnetism
Test your knowledge about electromagnetic or magnetic induction, Faraday's law, Lenz's law, and the Maxwell–Faraday equation. Learn about the production of electromotive force across an electrical conductor in a changing magnetic field and the historical contributions of Michael Faraday and James Clerk Maxwell.
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