Lenz Law of Electromagnetic Induction says that-The current induced in a loop flows in such a way so as to create a magnetic field opposite to the direction of the field that caused it. It is an another application of Newtonâs Third Law. Regards, Moid
They work on the energy conversion principle. They produce an electrical signal proportional to the input (physical quantity). For example, a thermocouple is an active transducer. Passive Transducers. Transducers which require an external power source for their operation is called as a passive transducer. They produce an output signal in the form of some variation in resistance, capacitance or any other electrical parameter, which than has to be converted to an equivalent current or voltage signal.
Transducer - The conversion of energy from one form to another is known as Transduction. A transducer serves for this purpose. Now why there is confusion is that, A Sensor can sense in any form(usually electronic) i.e due to some mechanical change, it can react in electrical form.