Page 398 - Physics Coursebook 2015 (A level)

Chapter 25:
Electronics
386
Learning outcomes
You should be able to:
■■ understand how electronic sensing devices are used to produce an output voltage
■■ describe the function of the following sensors: light-dependent resistor (LDR), negative temperature coefficient thermistor, piezo-electric transducer, metal-wire strain gauge
■■ recall the main properties of an ideal operational amplifier (op-amp)
■■ understand the use of an op-amp as a comparator, and as an inverting and non-inverting amplifier
■■ recall the circuit diagrams and calculate the voltage gain of inverting and non-inverting amplifiers for a single signal input
■■ understand output devices used in electronic circuits, such as the light-emitting diode (LED), the relay and calibrated analogue and digital meters