Current Division

Current Division: In a parallel circuit, the Current Division in all branches. Thus, a parallel circuit acts as a current divider. The total current entering into the parallel branches is divided into the branches currents according to the resistance values. The branch having higher resistance allows lesser current, and the branch with lower resistance allows […]

Kirchhoff’s Current Law

Kirchhoff’s Current Law: Kirchhoff’s Current Law states that the sum of the currents entering into any node is equal to the sum of the currents leaving that node. The node may be an interconnection of two or more branches. In any parallel circuit, the node is a junction point of two or more branches. The […]

Voltage Divider

Voltage Divider: The series circuit acts as a voltage divider. Since the same current flows through each resistor, the voltage drops are proportional to the values of resistors. Using this principle, different voltages can be obtained from a single source, called a voltage divider. For example, the voltage across a 40 Ω resistor is twice […]

Kirchhoff’s Voltage Law Examples

Kirchhoff’s Voltage Law Examples: Kirchhoff’s voltage law examples states that the algebraic sum of all branch voltages around any closed path in a circuit is always zero at all instants of time. When the current passes through a resistor, there is a loss of energy and, therefore, a voltage drop. In any element, the current […]

Voltage Current Characteristics

Voltage Current Characteristics: According to their terminal Voltage Current Characteristics, electrical Sources of Energy are categorised into ideal voltage sources and ideal current sources. Further they can be divided into independent and dependent sources. An ideal voltage source is a two-terminal element in which the voltage Vs is completely independent of the current is through […]

Capacitance Equation

Capacitance Equation: Capacitance Equation – Any two conducting surfaces separated by an insulating medium exhibit the property of a capacitor. The conducting surfaces are called electrodes, and the insulating medium is called dielectric. A capacitor stores energy in the form of an electric field that is established by the opposite charges on the two electrodes. […]

Inductance Equation

Inductance Equation: Inductance Equation – A wire of certain length, when twisted into a coil becomes a basic inductor. If current is made to pass through an inductor, an electromagnetic field is formed. A change in the magnitude of the current changes the electromagnetic field. Increase in current expands the fields, and decrease in current […]

Unit of Resistance

Unit of Resistance: Unit of Resistance – When a current flows in a material, the free electrons move through the material and collide with other atoms. These collisions cause the electrons to lose some of their energy. This loss of energy per unit charge is the drop in potential across the material. The amount of […]

Circuit Basics

Circuit Basics: The Circuit Basics consists of three parts: (1) energy source, such as battery or generator, (2) the load or sink, such as lamp or motor, and (3) connecting wires as shown in Fig. 1.2. This arrangement represents a simple Circuit Basics, A battery is connected to a lamp with two wires. The purpose of […]

Power and Energy

Power and Energy: Power and Energy – Power is the rate of change of energy, and is denoted by either P or p. If certain amount of energy is used over a certain length of time, then where dw is the change in energy and dt is the change in time. We can also write […]

What is Current

What is Current: What is Current – There are free electrons available in all semiconductive and conductive materials. These free electrons move at random in all directions within the structure in the absence of external pressure or voltage. If a certain amount of voltage is applied across the material, all the free electrons move in […]

Voltage Definition

Voltage Definition: Voltage Definition – According to the structure of an atom, we know that there are two types of charges: positive and negative. A force of attraction exists between these positive and negative charges. A certain amount of energy (work) is required to overcome the force and move the charges through a specific distance. […]