Basic electricity pdf

FUNDAMENTALS OF ELECTRICITY. The flow of free electrons in the same general direction from atom to atom is referred to as current and it is measured in amperes (“amps ” or “A”). The number of electrons that flow through a conductor’s cross-section in one second determines amps. Current (I) Current is the quantity of electrons passing a given point. The unit of current is the Ampere.

One Ampere is 28000000000electrons passing a point in one second.

A resistor is a dissipative element. It converts electrical energy into heat energy. It is analogous to the viscous friction element of mechanical system. When electrons enter at one end of a resistor, some of the electrons collide with atoms within the resistor.

These atoms start vibrating and transfer their energy to neighboring air molecules. Matter is composed of atoms. The following is a brief description of the information presented in each module of the handbook. Let’s start with three very basic concepts of electricity : namely, electric charge, electric current, and electric circuit.

A basic understanding of electricity and electrical systems is necessary for DOE nuclear facility operators, maintenance personnel, and the technical staff to safely operate and maintain the facility and facility support systems.

Principle of operation of dc machines, types of DC GENERAtors. A physicist named Georg S. Beginning with a broad picture of the electrical constituents of matter, the book proceeds with a discussion of static electricity , electricity in motion, and electrical circuits. Electricity means the flow of electric current. It is sometimes called an unseen force because the energy itself cannot be seen, hear touche or smelled.

However, the effects of electricity can be seen. Voltage is described as the pushing force behind electricity. Think of electricity as water running through a hose. The pressure (voltage) is what causes the water (current) to flow out of the end of the hose. CHECK VOLTAGE ON BOTH SIDES OF THE CIRCUIT BREAKER.

IF NO REPLACE CONTACTOR, IF YES PROCEED TO NEXT STEP. In a water heater, the hot water is drawn from what section of the tank? Using a volt meter, you will get a voltage reading when taking a measurement across an electrical power source.

Electrons create charge, which we can harness to do work. They all operate using the same basic power source: the movement of electrons. PREFACE The concepts discussed herein are intended to provide explanation and clarification of basic electrical safety for individuals who have little or limited training or familiarity with the field of electricity. The amount of “push” is the voltage – measured in Volts.

The circuit for the electricity to flow round needs to be built of electrical conductors and must provide a loop from the positive to the negative terminal of the battery.