jännittejakovastuksella

A jännittejakovastuksella, often translated as a voltage divider, is a simple passive linear circuit that produces an output voltage that is a fraction of its input voltage. It is composed of two or more resistors connected in series across a voltage source. The output voltage is taken across one of the resistors. The fundamental principle behind a voltage divider is Ohm's law, which states that the voltage across a resistor is proportional to the current flowing through it and its resistance.

In its most basic form, a voltage divider consists of two resistors, R1 and R2, connected in series to a voltage source, Vin. The output voltage, Vout, is typically measured across R2. The formula for calculating the output voltage of a simple two-resistor voltage divider is Vout = Vin * (R2 / (R1 + R2)). This formula shows that the output voltage is directly proportional to the input voltage and the ratio of R2 to the total resistance.

Voltage dividers are widely used in electronics for various purposes. They can be used to create a reference voltage for other components, to reduce a high voltage to a lower, usable level, or to sense voltage levels. For example, a potentiometer, which is a variable resistor, can be used as an adjustable voltage divider to provide a continuously variable output voltage. However, it's important to note that voltage dividers are not suitable for delivering significant current, as the output voltage will drop when a load is connected due to the increased current draw.