What is the approximate speed of electromagnetic waves in a vacuum?
Answer
299,792,458 metres per second
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What is the approximate speed of electromagnetic waves in a vacuum?
Answer
299,792,458 metres per second
What electromagnetic wave has the longest wavelength in the standard spectrum?
Answer
Radio waves
What is the name of the superconducting effect in which a material expels magnetic fields?
Answer
Meissner effect
What device uses electromagnetic induction to change alternating voltage levels?
Answer
Transformer
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Latest trivia questions
Which instrument measures electric current in a circuit?
Answer
Ammeter
What is the name of the superconducting effect in which a material expels magnetic fields?
Answer
Meissner effect
What law explains why electric current is the same at every point in a simple series circuit?
Answer
Kirchhoff’s current law
What phenomenon makes a changing electric field produce a magnetic field, completing Maxwell’s equations?
Answer
Displacement current
What type of current periodically reverses direction in an electrical circuit?
Answer
Alternating current
Which particle carries a negative electric charge?
Answer
Electron