Which of the following is not a major application of electromagnetic induction?
Correct answer: D. Telephone
- A. TV
- B. Radio
- C. Transformer
- D. Telephone
Explanation
Electromagnetic induction is the phenomenon where a changing magnetic field induces an electromotive force (EMF) in a conductor. This principle is fundamental to the operation of many devices, including:Telephones do not primarily rely on electromagnetic induction for their operation. They use electrical signals to transmit sound, and the process of converting sound waves into electrical signals and vice versa involves components like microphones and speakers.
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About Electromagnetism
Magnetic flux density and magnetic flux describe the strength of a magnetic field and the field passing through a surface. A charged particle moving through a magnetic field experiences a force perpendicular to its velocity and may follow circular or helical motion, depending on the angle between velocity and field.
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