Guide to the use of Resistors(I)

As we all know, any electrical element has resistance, and none is a pure conductor.

One might ask why the resistor is added to the circuit to reduce the current. Don't resistors consume power as heat? Is the efficiency of the circuit less efficient than before the resistor is not added? Yes, the resistor consumes power in the form of heat, but it optimizes the performance of the signal generating or amplifying circuit so that the circuit works optimally as the designer wishes.

Resistors play a wide variety of roles in electrical and electronic devices.

Voltage distribution.

We may all know that the resistor does consume some power when it works, but the voltage allocated by them can make the transistor or tube bias normally. This can guarantee that the amplifier or oscillator can work in the most efficient and reliable condition.