In a metal detector, when a metal object is brought near the search coil, its inductance
Correct answer: A. increases
- A. increases
- B. decreases
- C. increases or decreases depending upon AC frequency
- D. remains the same
Explanation
When a metal object is brought near the search coil of a metal detector, the inductance of the coil increases. This is due to the change in the magnetic field caused by the presence of the metal object, which induces eddy currents in the metal and alters the inductance of the coil
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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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