Correct option is D
An inductive proximity sensor detects metallic objects without physical contact. It works on the principle of electromagnetic induction and uses changes in oscillation frequency caused by the presence of a metal object to switch its output state.
Working of an Inductive Proximity Sensor:
Oscillator Circuit: The sensor generates an electromagnetic field around its detection area.
Metal Detection:
· When a metallic object enters the field, eddy currents are induced in the object.
· These eddy currents cause a
change in the oscillation frequency or amplitude of the oscillator.
Output Switching: The change in oscillation frequency is detected, and the sensor's output state switches accordingly.
