Resistance in Series

When two or more resistances are connected end to end consecutively, they are said to be connected in series. Figure 1 shows four resistances R1, R2, R3 and R4 which are connected in series. Resistances in series is denoted pictorially as shown in figure 2.   According to the law of combination of resistances in series, … Read more

Classification of Electrical Energy Sources


Electrical energy sources are majorly classified into two classes i.e. Independent sources and Dependent sources. The independent sources are further divided into two types namely voltage source and the current source. There are four types of the dependent sources. They are as follows 1. Voltage Controlled Voltage Source (VCVS) 2. Voltage Controlled Current Source (VCCS) 3. … Read more

Ohm’s Law – Definition & Limitations

Ohm’s Law Definition The current flowing through any conductor is directly proportional to the potential difference between two endpoints of the conductor at a constant temperature. where, ‘R’ is a constant known as the resistance of the conductor. The Ohm’s law can be applied to both AC and DC circuits. Limitations of Ohm’s law 1. It … Read more

Electrical Resistance | Resistor materials

The property of a material that opposes the flow of current through it, is called electrical resistance or simply resistance. The symbol of resistance is shown in the fig. 1. Practically, the electrical components that offers certain opposition (resistance) to the flow of current in the circuit is known as resistor. Fig. 1(b) shows some … Read more

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