Yes but for a small range of values of voltage or current. It is still infinite numbers between any 2 values are this is analog not digital. Between -5V and +5V there are infinite values of voltages.
Now Ohm's law may not apply for a given specimen if we increase for example above 5V. The ratio of voltage to current may be increasingly non linear. Heat is increasing. There may be smoke, the wire may fuse.
Same for a spring. Displacement is proportional to force up to a value. At larger values the spring may be permenatly deformed or even break.
Electron tubes and other amplifying devices such as bipolar transistors, JFETs are linear for a range of voltage or current values.
Earth is flat for a relative small range of traveling around a given point on earth.
Amplifiers with no feedback operating in class A, in fact an amplifying device operating in class A (electrons flowing all the time) are extremely linear at small signals (just like nature) and progressively non linear at higher signals. Just like nature.
No comments:
Post a Comment