Applications of Resistors

Current Limiting Resistors Circuit 1

Resistors are the basic components in almost all electrical or electronic circuits. Resistors control the amount of current that flow through them. They control the voltage in individual components connected to them. Without resistors, the individual components can’t handle the voltage and might result in overloading. Pull Up Resistors ​In electronic circuits, it is essential […]

Resistors in Series and Parallel Combinations

Resistor Networks - 1

Resistors in Series and Parallel Resistors can be connected in series connection alone or in parallel connection alone. Some resistor circuits are made from combination of series and parallel networks to develop more complex circuits. These circuits are generally known as Mixed Resistor Circuits. Even though these circuits have combined series and parallel circuits, there […]

Resistors in Parallel

Different ways of connecting resistors in parallel

Introduction Two resistors are said to be connected in parallel if both the terminals of a resistor are connected to each respective terminal of other resistor. In a network of parallel resistors, current can take more than one path unlike in series resistor network as there are multiple paths for the current to flow. Hence […]

Resistors in Series

Example 2 for Resistors in Series

Introduction Resistors are the basic components of any electrical or electronic circuit. Often resistors are found in large numbers irrespective of the size of the circuit. Resistors can be connected in series or in parallel or a combination of both. In order to reduce the complications of different combinations of resistors, some rules are to […]



Introduction Varistor is portmanteau of variable resistor. It is a passive non linear two terminal solid state semiconductor device. Varistor provide over voltage protection to electrical and electronic circuits in contrast to circuit breakers or fuse which provide protection to circuits from over current. Varistor provide protection by voltage clamping method which is similar to […]

Resistors in AC Circuits

The vector diagram representing this phase angle

Introduction In Direct Current (DC), the flow of electric charge is unidirectional. In DC, the voltage and current maintain a constant polarity and direction. The source of direct current is the battery. On the other hand, in Alternating Current (AC), the flow of electric charge reverses direction periodically. In AC, the voltage changes polarity from […]

Resistor Power Rating

Power Triangle

Introduction Resistors can be rated based on two values. First is based on the resistance of the resistor. Second is based on the power in Watts that a resistor can dissipate safely. The power rating of a resistor can be defined as the loss of electrical energy in the form of heat in a resistor […]

Potential Difference in Resistor Networks

Voltage Divider Circuit with Multiple Outputs

Potential Difference Definition Consider a task of moving a charge from A to B in a uniform electric field. Let this movement be against to the electric field. Some work will be done by an external force on this charge and this work will change the potential energy to a higher value. The amount of […]

Resistor Color Codes

Six Band Resistor Color Code

The electronic color code is a way of indicating the ratings or values of electronic components like resistors, capacitors, inductors and others. The electronic color code was developed in the early 1920 s by the Radio Manufacturers Association. Color code is used as they are cheap and can be printed on small components as well. […]

Types of Resistors

Types of Resistors

Like all electronic components, resistors are also available in different sizes, shapes and types. These variations in resistors bring advantages in some types and limitations in other types. This in turn makes some resistors suitable for some applications rather than others. Hence selection of correct resistors should be done with great care. Resistors Types Based […]