All of the Following Statements Are True EXCEPT

Multiple Choice

All of the following statements are true EXCEPT:

A) a knock sensor has a piezoelectric crystal sensing element that senses vibration and creates a voltage signal of 100 to 200 mV.
B) an oxygen (O₂) sensor is a variable DC voltage generator.
C) pulse generators are signal generators.
D) in a variable AC voltage generator, a magnetic pickup generates an AC analog signal with a positive and negative sine wave.