BASIC ELECTRICAL QUANTITIES

Presented by: El Niña Jude Buscato

OBJECTIVES To understand the basic terminology

of electricity Define a Electricity Define a Coulomb Define a CurrentDefine a Voltage Define an Resistance

is the set of physical phenomena associated with the presence and flow of electric charge. 

ELECTRICITY

Coulomb is a measurement for a quantity of electrons, and the practical unit for an electric charge .

One Coulomb = 6,240,000,000,000,000,000 electrons

Coulomb

Coulomb

Coulomb's law is a law of physics describing the electrostatic interaction between electrically charged particles.

It was first published in 1785 by French physicist Charles Augustin de Coulomb and was essential to the development of the theory of magnetism.

Coulomb

Charles Augustin de Coulomb

He liked to be called “Chuck” and to his friends,“Chucky C”

Current (I) continuous movement of

electrons through a conductor

it is measured in Amperes (A)

Ampere (A) The term

ampererefers to the number of

electrons passing to a given point

in 1 second.

1 C = 1 A × 1 s

Electrical Quantities

The impulse of electricity can appear to be faster than the speed of light

When a ball (electron) is pushed at one end, another ball (electron) at the other

end is forced out.

Ampere

Ammeter – an instrument used to measure current flow in a circuit.

The Voltage (V, EMF or E)

is electric pressure, a potential force or difference in electric charge between two points. is measured in Volts.

Voltmeter – an instrument used to measure voltage or potential energy difference of load or source.

The Resistance (R)

is the opposition to the flow of electrons or

current. is measured in Ohms Ω Voltmeter – an

instrument used to measure voltage or potential energy difference of load or source. Ohmmeter is used to measure resistance.

Ohm’s Law

E = Volts I = Amps R = Resistance (Ohms )

POWER

is the amount of electric energy converted to another form of energy in a given length of time. measured in Watts (W)

P = Voltage x Current

Wattmeter – an instrument used to measure power.

Can humans create electricity?

Electrical Systems

How many watts• 81 watts sleeping.• 128 standing at ease.• 163 walking.• 407 briskly walking•1,048 long-distance runner.•1,630 from a sprinter.

Electrical charges jump from one cell to another in lieu of wires until they reach their destination.

According to the Center for Space Power and Advanced Electronics, the human body is capable of producing 11,000 watt hours.

Electrical Systems

1. What is the practical unit of electric charge?

2. The continuous movement of electrons through a conductor.

3. Who was the French physicist essential to the development of the theory of magnetism?

4. Is a field of engineering that generally deals with the study and application of electricity, electronics and electromagnetism.

5. Is the set of physical phenomena associated with the presence and flow of electric charge. 

Questions:

6. Is credited w/ establishing the term “electricity” and probably the 1st electrical engineer who designed the “VERSORIUM”.7. What is SI unit of Current, Resistance and Voltage?8. What is the instrument used to measure current flow in a circuit?9. What is the instrument used to measure voltage or potential energy difference of load or source. 10. Is the amount of electric energy converted to another form of energy in a given length of time.

Questions: