Why are metals good conductors of electricity and heat?

In current electricity, we became to know that the flow of electric charges is electricity. Again, from Thermodynamics, we know that heat is an energy that can flow from one part to another part of a substance. You may have noticed that a wiring of copper (Cu) wire is used in our home or office … Read more

Formula of Linear charge density & its calculation

A continuously charged conductor can have three types of charge densities. We already discussed surface charge density and volume charge density in other two articles. In this article, we’re going to discuss line charge density. Here you will learn the concept, definition and formula of linear charge density and how to calculate it. Contents in … Read more

Volume charge density formula of sphere, cylinder

A three-dimensional conductor can have three types of charge distributions. These are Line charge distribution, surface charge distribution and volume charge distribution. Obviously, there will be three types of charge densities for these three distributions. In the other two articles, we have discussed the Linear charge density and surface charge density of different conductors. In … Read more

Equations for Force in Physics | definition formula unit

We have discussed Newton’s three laws of motion in other three articles. We get the definition of force from Newton’s first law of motion and the formula or the equation of force was derived from Newton’s second law of motion. Again, the third law gives an idea for the law of conservation of linear momentum. … Read more

Types of errors in measurement – sources and corrections

Error is a part of measurement. In an experiment, the aim is to get accurate result. But, practically it is very difficult to achieve 100% accuracy in a measurement. When the measured value differs from the actual value, then there is an error in that measurement. That means, if there is no 100% accuracy, then … Read more

Formula of Power factor in electrical circuit

Power factor is an important parameter of an electrical circuit. To deal with a circuit, we need to know how much power is to be supplied to its components so that the circuit works. Because the dissipation of power in a circuit may not be the same as that of real power supplied by the … Read more

Projectile Motion Equations in Physics

Equations for the linear motion and free fall are known to all. Using these equations one can find the position, velocity, acceleration and energy of a particle moving in a straight line with a constant velocity or constant acceleration. If we throw an object at an angle with respect to the ground, it will not … Read more

Unity Power factor in electrical circuit | formula & concept

We already have discussed the Power factor of an electrical circuit and how to calculate the power factor, etc. You might have heard the term unity power factor while dealing with the power in electric AC circuits. In this article, we are going to discuss the concept and formula of Unity Power factor of an … Read more

How to calculate Power factor in electrical AC circuit?

In another article, we have discussed the power factor, its definition, its formula and other related facts on power factor. Now, we need to find the power factor in a circuit to know how much power is delivering to its output and how much power is losing in circuit components. In this article, we are … Read more

Focal length of a concave mirror – theory and experiment

Spherical mirror has two types – Concave mirror and Convex mirror. In this article, we’re going to discuss the focal length of a concave mirror. Though, the focal length of both types of mirrors has the same definition and units, but the signs of focal length are different for these two mirrors. Here, we have … Read more