The changing electric flux in a certain region of space produces:
Correct answer: C. Both A and B
- A. An electric field
- B. Magnetic field
- C. Both A and B
- D. None of the above
Explanation
Faraday's law of electromagnetic induction states that a changing electric flux will result in the induction of a magnetic field. This principle is fundamental in electromagnetism, describing how electric and magnetic fields are interrelated. The correct choice is that both a magnetic and an induced electric field can result from changing fluxes, but not directly from changing electric flux alone. Therefore, the correct answer is that a changing electric flux produces a magnetic field, with the potential to also indirectly influence electric fields through electromagnetic induction processes. Options A and D are incorrect because they don't accurately describe the relationship between electric flux and the fields it influences.
This question appeared on the ETEA MDCAT 2016 paper, which you can sit online with every answer explained.
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About Electromagnetic Waves
Electromagnetic waves consist of mutually perpendicular, oscillating electric and magnetic fields that also remain perpendicular to the direction of propagation. They travel through vacuum at the speed of light and include radio waves, microwaves, infrared, visible, ultraviolet, X-rays and gamma rays. Unlike mechanical waves, they do not require a material medium.
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