We use a Current Transformer (C.T.) as an “instrument transformer.” It creates an alternating current in its secondary winding that matches the current in its primary winding. Current transformers lower high voltage currents to safer levels. They help us monitor the actual electrical current in an AC transmission line using a standard ammeter. The way […]
Current
Understanding FET Current Source: Explained with Formulas
An FET Current Source is a specific kind of active circuit which employs a Field Effect Transistor to provide a steady and a constant amount of current to a circuit. Now you might wonder why it is important for us to have a constant current. Constant current sources and their opposite, which we call current […]
Understanding Current Divider Circuits, with Calculations
Basically, circuits with parallel components serve as current dividers. Through these circuits, the supply’s total current is divided among many parallel pathways. A practical connectivity system is formed by all components sharing the same two connecting points. With this configuration, the current can flow through a variety of branches and routes. Interestingly, each component’s current […]
Understanding Kirchhoff’s Current Law with Calculations
In order to quantify current behavior, circuit analysis uses Kirchhoffs Current Law (KCL). The connecting point or junction, in an electrical or electronic circuit determines the relationship between currents according to this rule. At any circuit junction: Σ IOUT = Σ IIN The algebraic total of all currents entering the junction is represented by Σ IIN. […]
Understanding Current Sources with Calculations
Unlike voltage sources which focus on constant voltage, current sources are more concerned with ensuring a constant supply of current (amps). The current flow stays constant regardless of the voltage developed at their terminals (which is determined by other circuit components). Consider a water pump that continues to push a certain amount of water regardless […]
How to Calculate Mesh Current in a Circuit
Mesh current analysis calculates currents in closed loops of a circuit by assigning hypothetical loop currents and using Kirchhoff’s Voltage Law. Although the basis for evaluating any electrical circuit is provided by Kirchhoffs Current Law (KCL) and Voltage Law (KVL), other methods such as Mesh Current Analysis and Nodal Voltage Analysis are also available. These […]