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97問 • 1年前

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A vital component of the countries economy that is widely utilized by human being

Electricity

It is a form of energy generated by friction induction, magnetic chemical, or defect or simply. We can tell it electrons in motion.

Electricity

When was electricity discovered

600 BC by the Greeks

It is from Latin word “electricus” means

Amber or like Amber

It consist of electron proton and neutron

Electricity

It is one of the most important invention of the man

Electricity

He is an English physicist, known as the father of electricity

William Gilbert

He is the author of the book, electric attraction, and the electric force

William Gilbert

Name the two books of William Gilbert

Electric attraction, The electric force

She conducted extensive research in electricity in 18th century

Benjamin Franklin

When does Benjamin Franklin conducted his extensive research and electricity

18th century

What are the two classification of electric circuit?

Direct current, or DC circuit, Alternating current or AC circuit

It is an electricity that flow in one direction from negative the positive

DC circuit

It is where the electricity constantly reverses the flow with the following advantages

Alternating current

What is the source of AC circuit?

Generators

What is the source of DC circuit?

Battery

It goes through one Positive loop and one negative loop to form one complete cycle that is continuously repeated

Alternating current

It is where the current goes through one Positive loop and one negative loop the form one complete cycle that is continuously repeated

Frequency

What is the unit of frequency?

Hertz

What is the frequency in the Philippines?

60 Hz

It is the friction that opposed to the flow of current

Resistance

What is the friction that oppose to the flow of the direct current?

Resistance

It is the flow that opposed to the flow of the current in the alternating current

Impedance

What is the unit of resistance?

Ohm

What will happen to the current if there is a higher voltage?

It will become larger

What will happen to the current, if there is a higher resistance?

The current will become lower

What are the factors that influences conductor resistance?

Composition of the conductor, Length of wire, Cross-sectional area of wire, temperature

It refers to the conductor having free electrons that has low resistance

Composition of the conductor

It is the longer the wire, the higher the resistance

Length of wire

The bigger cross-sectional area of the wire The lower its resistance

Cross-section an area of wire

The longer the wire, what will happen to the resistance

The higher resistance

The bigger, cross-sectional area, what will happen to the resistance

The lower the resistance

The higher, the temperature, what will happen to the resistance

The higher resistance

It is the algebra sum of the current entering the node, which is equals to zero

Kirchoff current law

What does the current carries when entering the node?

Positive sign

What does the current curious when? Leaving the node?

Electrons or the negative sine

It is the algebraic sum of the voltage in a close path which is equals to zero

Kirchoff voltage law

Voltage is dependent to block either if the work done by the system to the system

Polarity

It states that the voltage across any resistor in a circuit series is equal to the product of the total applied voltage and divided, with the sum of series resistors

Voltage divider principle

It states the circuit containing and parallel branches. The current I, N, in a particular branch of resistor, is equal to the product of applied current and equivalent resistance of the parallel circuit.

Current divider principle

It is used because of the similarity in appearance between the close of the network in a wire mesh fence

Mesh

It is a close pathway with no other close pathway within it

Mesh

It is also a close pathway, but it have other close pathway within it

Loop

It is based on KCl and allows us to construct equations for wide variation of circuits

Nodal analysis

It states that a desired current or voltage in linear circuit, having more than independent source can be obtained by adding their responses caused by the separate independence sources acting alone

Superposition theorem

What configuration where all single face load is concentrated on one phase?

Delta configuration

What configuration where all the single phase load is distributed on each of the three faces?

wye configuration

It uses only three phase conductors

Delta configuration

Afford a neutral conductor, which is often grounded, and all of the three loads are connected at the single neutral point

wye connected systems

It is a three phase 4 wire circuit used in a three phase electrical system, which is formed by connecting stating or terminal ends of all the three windings together

wye connection

It is a point in which the three faces meet at the center

Neutral point

It is a three face circuit formed by connecting one end of winding to staring and of other and connections are continued to form a closed loop, which resembles a triangle

Delta connection

It is less expensive because it requires only three conductors, making equipment and construction cost lower

Delta configuration

It leads to less expensive distribution system, because Transformers closures and lightning arresters for this system cost less when compared to the equivalence in the other system

wye configuration

It requires only one high voltage bushing for Y systems

Single phase service, transformer

How many high voltage does the Single face service transformers requires in Delta configuration

two

It is mainly used in distribution networks

Delta configuration

It is used in both transmission and distribution networks

wye configuration

It is used in application that requires a high starting to torque

Delta configuration

Ideally preferred in application that would require less starting current

wye configurations

Used for shorter distances

Delta connection

Used for power transmission networks for longer distances

wye connection

It is primarily used at small industrial facilities that had a relatively large 240 V aire motor load, but only small need for convenience, outlets and lighting

Delta

Passive elements that are capable of storing and delivering finite amount of energy

Inductor and capacitor

They cannot provide finite average power over an infinite time interval

Inductors and capacitors

A passive electronic components with two terminals that stores electrical energy in an electrical field

Capacitors

Capacitor is an active electronic component with two terminals that stores electrical energy in an electric field

False

What is called on the effect of a capacitor

Capacitance

Farad is a unit of

Capacitance

What will happen to the current if the voltage across it it’s not changing with time

There’s no current through capacitor

What is the capacitor to DC?

It is an open circuit

Capacitor never dissipates energy, but

Only stores it

It is characterized by its inductance

Inductors

It is the ratio of dev voltage to the rate of change of current and has an SI unit of Henry

Inductance

It typically consist of an insulated wire wounded into a coil around a core

Inductor

Passive two terminal electrical component that stores energy in a magnetic field when electric current flows through it

Inductor

The time, worrying, magnetic field, induces and electromotive force in the Conductor, when

The current through an inductor changes

According to this law, the induced voltage has a polarity or direction which opposes to the change in current that created it

Lenz’s Law

It is a law where the result is inductors oppose any changes changes in current through them

Lenz’s Law

It is a electrical circuit consisting of a resistor inductor, and a capacitor connected in a series or in parallel

RLC circuit

If you says, from radio, receivers and television sets to select a narrow frequency range from ambient radio waves

RLC circuit

RLC circuit stands for

Resistance, inductor, and capacitor

Ratio of working power to apparent power

Power factor

It measures how effectively electric power is being used

Power factor

What does it mean when there is a high power factor?

Efficient utilization of electrical power

What does it mean when there is a low power factor?

It indicates poor, or you are not utilizing the electrical power you are paying

What are the two kinds of current that inductive load require?

Working power, Reactive power

It is the power to perform the actual work of creating heat, light and motion, machine, output, and so on

Working power

A power to sustain the magnetic field

Reactive power

It is consume and can be read on what meter it is measured in kilowatts

Working power

True or false Reactive power does perform useful work, but circulates between the generator and the load

False

Reactive power places heavier, drain on power source as well on the power source distribution system

True

It measures in kilovolt amperes reactive

Reactive Power

It measured in kilovolt amperes

Apparent power

What should be done when your apparent power is greater than working power?

The utility must supply the access, reactive current plus the working current

It act as a reactive current

Power capacitors

What is the percentage of the maximum benefit of power factor correction in practical usage?

95%

Materials

ユーザ名非公開 · 100問 · 2年前

Materials