The principle of transformer is?
Correct answer: A. Mutual induction
- A. Mutual induction
- B. Self induction
- C. Motional emf
- D. None of these
Explanation
Option A is correct as when a transformer's primary coil has an AC flowing through it; magnetic flux surrounds the conductor in proportion to the amount of current. The expanding and contracting flux cuts the secondary coil and induces a voltage in it. This is "mutual induction".
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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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