Capacitance of parallel plate capacitor with dielectric medium

In the previous article, I explained the capacitance of different types of capacitors. A parallel plate capacitor is one of the most popular capacitors and it has wide applications in electrical circuits. In this article, I’m going to explain the capacitance of a parallel plate capacitor and its behavior in presence of a dielectric medium … Read more

20+ MCQ on speed velocity and acceleration

MCQ on speed, velocity and acceleration are very much important board exam like CBSE, ICSE and other competitive exams like JEE and NEET. Speed, velocity and acceleration terms are related to the chapter One dimensional motion of kinematics. Some of the job exams also cover this chapter for the selection of the candidates. Therefore, in … Read more

Formula for Capacitance of a Capacitor – spherical, cylindrical

A Capacitor is one of the most useful circuit components. A capacitor can store electric charge or electric energy in it. The capacitor is nothing but a conductor or the combination of two conductors having equal and opposite charges. Then what makes the capacitor different from a conductor? What are the different types of capacitors? … Read more

Why is the color of Kerosene blue or red?

The colors of Kerosene oil are different in different countries like United States, India, Australia, etc. In India, the Kerosene oil is blue, in United States, it is red and in other countries, kerosene has different colors. Now, the question is “What is the actual color of Kerosene oil? Is it blue or red or … Read more

Gauss’s law of electrostatics – formula & derivation

An electric charge can produce an electric field around it. Since there are various types of charge distributions in different conductors, the formula for the electric field will be different for those. Gauss’s law of electrostatics is that kind of law that can be used to find the electric field due to symmetrically charged conductors … Read more

Electric potential energy due to a point charge

We know that an electric charge can produce an electric field around it and one can use Gauss’s law to find the electric fields due to symmetric charge distributions. This electric field is responsible for the electrostatic force between the charges. As a result, charged particles can move inside the electric field region. Since the … Read more

Properties of Equipotential surface in uniform electric field

We have learned the electric Potential and potential energy in other articles. In this article, we are going to discuss the equipotential surface and its properties. Here we will consider that the equipotential surface in a uniform electric field. That means the strength of the electric field is equal at every point and electric field … Read more

10 examples of output devices for computer with use

In the architecture of a computer, one can see that a computer consists of Input devices, Output devices, Memory units and a CPU. Input devices help to input the data to a computer and output devices help us to read and receive the output data. Memory units store the data in the computer. We already … Read more

Expression for drift velocity of free electrons

If an external electric field is applied across a conductor, free electrons move in the conductor. The velocities of all the electrons are not the same at every point in the conductor. Therefore, we need to consider the average value of the velocities of the electrons. It is nothing but the drift velocity. In this … Read more

Mobility of electrons and holes in semiconductors

The term mobility in electronics refers to the ability to move. Electrical mobility of an electron in a semiconductor gives the idea of the movement of the electron when the material is placed in an electric field. The mobility of free electrons and holes is not the same. It depends on many factors like the … Read more