To move an electrical charge in a specific direction you need to apply some force. This force is called by an external electromotive force…

# Category: Learning

## Electric circuit elements / active elements

A circuit is an interconnection of circuit elements. And analysing circuits we determine voltages and currents through the circuit elements. Let's assume that all…

## Resistors in series. Voltage divider circuit and equation

Resistance is an electric circuit component, which is characterised by energy losses in a circuit as heat, some mechanical work, or electromagnetic radiation. No…

## Resistors in parallel. Current divider circuit and equation

Two or more resistors are said to be in parallel, if identical voltage is across all the resistors. In accordance to Kirhhoff's Law the…

## Passive elements – inductance

Inductance is an ideal electric circuit component which is close to the inductor in its features and components - collecting the energy of magnetic…

## Passive elements – capacitance

Capacitance is an ideal element of an electric circuit, replacing the capacitor, storing the energy of electric field. Capacitance is marked with the letter C…

## Replacing circuit components with ideal circuit elements

Let us talk about the importance of replacing real circuit components by their ideal circuit elements, taking into account complex factors. Representation of resistance,…

## Linear electric circuits

Linear electric circuits and linear circuit elements are those where resistance, capacitance and inductance are not dependent on the current or voltage magnitude and…

## Voltage division – equivalent resistance for series connection

Let us take two resistors R1 and R2 in series and voltage source V (figure below). Resistors are in series here and create a single-loop with…

## Current division – equivalent resistance for parallel connection

Let us take n resistors R1 ... Rn connected in parallel with voltage source V. According to Ohm’s Law the same voltage goes through each resistor.…