Electronics & Software – Tips & Guide


Does a resistor increase the voltage in an electronic circuit?

Does a resistor increase the voltage in an electronic circuit?

It could increase, decrease or do nothing with the voltage depending on the circuit and between which two points you measure the voltage. It would be totally dependent on the circuit. The wire coils act as high frequency inductors, so they can add impedance and increase the AC component of the voltage.

If a power source uses a resistor as a calibration element, temperature changes may distort the set point and increase or decrease the voltage.

A resistance will increase the voltage in a circuit when it will be added in series to a load. The effect is to reduce the load by adding resistance. The source voltage will therefore increase. The amount of the increase will be proportional to the value of the resistance in relation to the resistance of the load.

In general, no, adding a passive circuit element such as a resistor will not increase the voltage. Like to add some tension in the system or something like that. However, it is true to say that the resistance can cause a potential change inducing a voltage. Thus, for example, one end of the resistor may be at a higher potential than the other end, and the voltage induced by this potential difference is characterized by the ohms law.

Voltage is the potential difference between two points. It’s relative. A resistor is a device that transforms electrical energy into heat. In fact, it wastes energy and thus caused a drop in potential, that is, voltage. A resistor is a device that always transforms a higher potential into a lower potential, that is, when the current flows through it.

In the minimum case of zero current, the voltage is the same at both ends of the resistor. A resistance, by itself, can never increase the tension.

It can have a drop or voltage drop. The only way to see a higher voltage on a resistor is if another source of current with higher potential is present at that junction.