All About Electrical & Electronics
Consider a system of two insulated conductors placed in such a way that if charged on one conducted is +Q, the induced charged on the Other conductor will be -Q. If V is the potential difference between the conductors, for a particular system, the ratio of Q to V is constant, depending on the size … Read more
Effective, Virtual, or R.M.S. Value of an Alternating Quantity:_ The question soon arises as to what is to be taken as the effective value of an alternating current relative to a direct current; and since the whole object of producing a current, either direct or alternating, is to transfer energy from one part of the … Read more
If we Consider a point charge of a Q coulombs of positive electricity situated at the center of a sphere of a radius r metres, the field strength at any point on the surface is given by Refer to below fig. The electrostatic flux density D can be defined as the number of the lines of … Read more
The conception of electrical power plays an important role in Electrical Engineering. Almost all electrical appliances are rated for the voltage of the source on which it can work and also the amount of power required for its operation. For example, an electric lamp is rated as 250 V, 60 W etc. As has been … Read more
When two charges Q1 and Q2 are place near each other, a force of attraction or repulsion is produced between them as per Coulomb’s law. At the point occupied by charge Q1 we can imagine that the electrical state of space is caused by other charge Q2. This is due to electrical field caused by … Read more
1. Bodies with like charge repel each other and bodies with unlike charge attract each other. i. e. If two positively charged bodies are placed near each other, they repel each other while if one is positively charged and other is negatively charged, they attract each other. The force of attraction or repulsion between these … Read more
Atom is the smallest particle of matter and it it consist of three main part. Protons, neutrons and electrons. The protons and neutrons are normally intimate with each other and form the nucleus of the atom. The electrons are particles rotating in the orbit around the nucleus like planets around the sun. The number of … Read more
Ohm’s Law:- Consider a circuit as shown in Fig. 1 which consists of an ammeter, eureka wire 4 meters length, a rheostat and a battery, all connected in series. A voltmeter has been connected across the two ends of eureka wire. For various settings of the rheostat tabulate the readings of V and I with … Read more
Effects of Electric Current:- There are three main phenomena that an electric current can produce. They are: (1) Heating effect – When an electric potential is applied to a wire the drift of electrons is opposed by the resistance of the wire, so heat is produced. The production of electrical heat can well be compared … Read more
Conductance:- The reciprocal of the resistance is called as the conductance and is represented by G. As the resistance is defined as the opposition offered by the conductor to the flow of current, so the conductance is defined as the inducement which the conductor offers to the flow of current. The unit of conductance is … Read more