Conceptually, a sensor is a component with a single output as in Illustration 7. A sensor outputs a signal that varies over time. When dealing with signals that represent physical phenomena, we can think of a sensor as a device that converts energy from one form (heat, light, pressure, etc.. to another form (typically an electrical voltage.. Which following parameters are important with sensors?

Parameters

a) 2,4
b) 1,3
c) 1,2,3,4
d) 3,4