Nodal analysis

Nodal analysis with current source Nodal analysis is the method to determine voltage or current using nodes of the circuit. In node analysis we choose node voltage instead of element voltages and hence the equations reduces in this process. We ...

What is node, branch and loop in a circuit

Interconnection of some elements is an electrical circuit. A circuit is a network. So to differentiate between a circuit and a network, we should understand the path of circuit. A branch represents a single element such as voltage source or ...

Define active and passive circuit elements

Electric circuit has many elements like resistor, capacitor, inductor, battery etc. Circuit analysis is the process by which voltage or current is measured across the element. In a complete circuit there are two types of elements found active elements and ...

What is Amplifier?

Amplifier is an electronic device. The device which increases the value of a signal is called amplifier. In input a weak signal is applied, in output a strong, same shape signal is gained. Amplify means to increase the value of ...

What is a transistor?

What is transistor? Transistor is an electronic device. It is made with p and n type semiconductor. When a semiconductor is placed in middle between same type semiconductors the configuration is called transistor. We can say that a transistor is ...

Concepts of band theory

An atom has electron, protons and neutrons. According to the Bohr’s atomic model theory nucleus of an atom contains protons and neutrons. Neutrons has no charge and protons have positively charged electrons moves around the nucleus in different orbits far ...

How a solar cell works?

Definition of solar cell  Solar cell is that cell which converts light energy to electrical energy. Working principal of solar cell is related to emission of light or absorption. It is an electronic device. Actually solar cell is p-n junction ...

intrinsic and extrinsic semiconductors

There are two types of semiconductors (i)  Intrinsic or pure semiconductor (ii)  Extrinsic or impure semiconductor (i)  Intrinsic or pure semiconductor: The conduction band of silicon and germanium is empty and the valence band is fully filled up with electrons ...