Category: 07. Electricity

Electric current is the ability to do work. Electric current can be converted to heat, power and magnetism, to name a few.Electric current is classified by its functions and three primary types are:1.Heat and power2.Electrochemistry3.Magnetism1. Heat and power is used to make heat and power. For example, current-carrying nichrom wire that nichrom wire has a high resistance and…

The instrument used to measure resistance is called test meter or multimeter. The multimeter or test meter is used to make various electrical measurements such as current, voltage and resistance. It combines the functions of ammeter, voltmeter and ohmmeter. � Steps for resistance measurementTurn the face dial to a position for required measuring, resistance, then touch both of…

The instrument used to measure voltage, difference potential or electromotive force is called voltmeter. � Steps for voltage measurementConnect a small light bulb to a dry cell. A voltmeter is wired in parallel with the light bulb to measure voltage across the light bulb. Connect positive terminal (+) of voltmeter to positive terminal (+) of a…

The instrument used to measure current is called ampere meter or ammeter. � Steps for current measurement Connect a small light bulb to a dry cell. Measure current that passes through light bulb by connecting positive terminal (+) of ammeter to negative terminal (-) of a dry cell (see figure) � Safety instructions for current measurement; 1. Estimate…

Electrons move through a conductor when electric current flows. All materials impede flow of electric current to some extent. This characteristic is called resistance. Resistance increases with an increase of length or decrease of cross-section of a material. The unit of measurement for resistance is ohms and its symbol is the Greek letter omega (Ω). The resistance of…

Electric current is flow of electrons in a conductor. The force required to make current flow through a conductor is called voltage and potential is the other term of voltage. For example, the first element has more positive charges, so it has higher potential. On the other hand, the second element has charges that are more negative so it…

An electrical phenomenon is caused by flow of free electrons from one atom to another. The characteristics of current electricity are opposite to those of static electricity.Wires are made up of conductors such as copper or aluminum. Atoms of metal are made up of free electrons, which freely move from one atom to the next. If an…

Any appliances that we use in our daily lives such as household appliances, office equipments and industrial equipments, almost all of those things take electricity. Therefore, we should understand electricity.The first question that we will find out the answer is “where does electricity come from?“ All matters are made up of atoms. Then ask the…