Explain Sensor and Actuators with example.

Question :

Explain Sensor and Actuators with example.

Sensor are devices that responds to a physical quantity with a signal and Actuators are devices that respond to signals with physical movement (or similar action) can be considered as transducers.
For example, a Microphone is a Sensor, which converts sound waves into electrical signals and a Loudspeaker is an Actuator, which converts electrical signal into audio signals.