Question
Physics Question on Electromagnetic induction
Metal detector works on the principle of
A
Ohm's law
B
Couloumb's Law
C
Electromagnetic induction
D
Stefan's law of radiation
Answer
Electromagnetic induction
Explanation
Solution
The correct option is: (C): Electromagnetic induction.
A metal detector works on the principle of electromagnetic induction. This is because when a metal object enters the detector's electromagnetic field, it induces eddy currents in the metal. These eddy currents, in turn, create their own magnetic fields that oppose the original field. The resulting changes in the electromagnetic field are detected by the device, allowing it to identify the presence of metal objects. This phenomenon of electromagnetic induction is the foundation of how metal detectors can locate and identify metallic objects.