CURRENT FLOW IN A CIRCUIT

ELECTRICITY                                   

      A current of electricity is a steady flow of electrons. When electrons move from one place to another, round a      circuit, they carry electrical energy from place to place like marching ants carrying leaves. Instead of carrying leaves, electrons carry a tiny amount of electric charge.

     Electricity can travel through something when its structure allows electrons to move through it easily. Metals like  copper have “free” electrons that are not bound tightly to their parent atoms. These electrons flow freely throughout the structure of copper and this is what enables an electric current to flow. In rubber, the electrons are more tightly bound. There are no “free” electrons and, as a result, electricity does not really flow through rubber at all. Conductors that let electricity flow freely are said to have a high conductance and a low resistance; insulators that do not allow electricity to flow are the opposite: they have a low conductance and a high resistance.


                                   

Electric Circuit

The electric circuits are closed-loop or paths, forming a network of electrical components where electrons can flow. This path is made using electrical wires and is powered by a source, like a battery. The start of the point from where the electrons start flowing is called the source, whereas the point where electrons leave the electrical circuit is called the return. Let’s conduct a small experiment; you would need the following,

  • Electric bulb
  • Wire
  • Electrical tape
  • A battery

Electric Circuit

Connect the wires to the bulb and connect one end of the wire to the battery. Notice what happens, there won’t be any change in the bulb, but when you connect the free wire to the battery and complete the circuit, you will notice that the bulb starts glowing. Therefore the circuit must be completed for the current to flow.

An electrical circuit is complete only when there is at least one closed loop from the positive to the negative end. This is the simplest form of an electric circuit. The circuit found inside a television is more complicated and has different components.


 

 

  How the torch bulb glows...
        Prepare an arrangement to light a bulb using two  torch cells, one torch bulb and two pieces copper wires.Light the bulb. This arrangement is an electric circuit.

 Observe the diagram of the circuit. A path is prepared for current to flow from one terminal to the other terminal of the torch cells through a copper wire and a bulb .The bulb glows when the circuit is complete. Such a circuit is called a closed circuit.


           disconnect any part of the circuit. Does the bulb glow?

            In such situations the circuit is said to be an open circuit. The bulb does not glow



                                                                         THE HISTORY OF CIRCUIT


The first electric circuit was invented by Alessandro Volta in 1800. Volta discovered that he could produce a steady flow of electricity using bowls of salt solution connected by metal strips. Later, he used alternating discs of copper,    zinc, and cardboard that had been soaked in a salt solution to create his voltaic pile (an early battery). He successfully made the electric current flow through the circuit by attaching a wire running from top to bottom. The first practical use of electric current was employed in electrolysis, which further led to the development of new chemical elements.  

Comments

Post a Comment

Popular posts from this blog

TRADITIONAL GAMES - GOLI

Image
  Golli Gundu is one of the popular  traditional games  of India. However, many parents are not supportive of this game as it is considered as one of the street games. A golli is a small spherical toy usually made from glass, clay, steel, plastic or agate available in varied diameters. Golli is also called as ‘Kanchey’ in North India and ‘Marble’ in  English language . Things Required to Play Golli Gundu A set of golli about 1 cm in diameter. A shallow hole and the hole is usually dug in an open ground. The number of players can be two or more. Rules and Regulations of Playing Golli Gundu The rules and regulations of playing this traditional game are as follows: Setting the Aim - Firstly, the player has to hold the golli firmly in the forefinger of the left hand. Then he has to stretch the finger back like a bow-string by the pressure of the forefinger of the right hand. And finally, the player has to shoot the golli by releasing the  finger . While pushing the ...
Read more

A STUDY ON NEGLECTION OF MOTHERTONGUE IN EDUCATION SECTOR

REHANA K A ABSTRACT                                This study investigates the neglect of mother toungue language in education sector .protecting malayalam language is equal to protecting ones own body and identify. Malayalam is one of the 22 scheduled language of India.Malayalam was designated as a classical language of India on 2013.Malayalam has official language status in Kerala and Puducherry and is also the primary spoken language of lakshadweep and is spoken by 34 million people in India.This language has to be more than  1500 years old.so it is given the classical status.Tamil,Kannada,Telugu and Malayalam have satisfied these condition.we all have the right to speak in our mother tongue.But most of the schools in Kerala restrict students and even teachers from speaking and using malayalam.This study reveals whether there is any neglectance for the same through survey method.  INTRODUCTION ...
Read more