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Showing posts with label Basic Electricity Posts. Show all posts
Showing posts with label Basic Electricity Posts. Show all posts

Tuesday, December 3, 2013

When two resistors are connected between the same two points in a circuit they are said to be in parallel with each other.
The voltage across all the resistors are equal and the current in each resistor is different.

 In Short that those electric circuit which have two way to pass the current then we called him parallel circuit.

Parallel Circuit

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What is Parallel Circuit?

When two resistors are connected between the same two points in a circuit they are said to be in parallel with each other.
The voltage across all the resistors are equal and the current in each resistor is different.

 In Short that those electric circuit which have two way to pass the current then we called him parallel circuit.

Parallel Circuit

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Posted at 10:50 PM |  by Unknown
If two resistors are connected in this way that the current passing through one must pass through the other, then we say that these two resistors are connected in series.
The value of current is same in both two resistors because there is no other path for current in which it can flow.
In short words we can say that in a series circuit, the current is same.

         I1 = I2 = ...................... = In

 In the series circuit the voltage drop across each resistor are different.
The high value resistance take large voltage drops and the low value resistance takes small voltage drops.
The sum of voltage drops across each resistor in series circuit is equal to the total supply voltages and the total circuit resistance is equal to the sum of total resistances in series circuit.
                       
                                             R1 + R2 + R3 = Rt
Series Circuit



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What is Series Circuit?

If two resistors are connected in this way that the current passing through one must pass through the other, then we say that these two resistors are connected in series.
The value of current is same in both two resistors because there is no other path for current in which it can flow.
In short words we can say that in a series circuit, the current is same.

         I1 = I2 = ...................... = In

 In the series circuit the voltage drop across each resistor are different.
The high value resistance take large voltage drops and the low value resistance takes small voltage drops.
The sum of voltage drops across each resistor in series circuit is equal to the total supply voltages and the total circuit resistance is equal to the sum of total resistances in series circuit.
                       
                                             R1 + R2 + R3 = Rt
Series Circuit



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Posted at 10:50 PM |  by Unknown
Open circuit has an infinite resistance. In open circuit the current mush be zero. It is called uncompleted circuit or disconnected circuit. In electric circuit when switch id OFF then this OFF position shows an open circuit.

Open Electric Circuit


 Closed Electric Circuit :
                                                It is called complete circuit, in which electric current may flow and complete its path.
Closed Electric Circuit


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Open Electric Circuit and Closed Electric Circuit

Open circuit has an infinite resistance. In open circuit the current mush be zero. It is called uncompleted circuit or disconnected circuit. In electric circuit when switch id OFF then this OFF position shows an open circuit.

Open Electric Circuit


 Closed Electric Circuit :
                                                It is called complete circuit, in which electric current may flow and complete its path.
Closed Electric Circuit


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Posted at 10:49 PM |  by Unknown
Electric circuit is a path in which electric current may flow.
In electric circuit there are many electrical devices are interconnected in which electric current may flow. Electric circuit may be consists into three parts.

1= The source of electricity.
2= The electrical device.
3= The wires and control gear; in which electric current may flow.

I show a type of electric circuit in below diagram, i hope you like it.
Electric circuit

An electric circuit is consists on three wires. The phase wire which is directly connected to the switch and second wire which is connected to the electric load or device and third wire is connected the neutral side of supply to electric device or apparatus.


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What is Electric Circuit?

Electric circuit is a path in which electric current may flow.
In electric circuit there are many electrical devices are interconnected in which electric current may flow. Electric circuit may be consists into three parts.

1= The source of electricity.
2= The electrical device.
3= The wires and control gear; in which electric current may flow.

I show a type of electric circuit in below diagram, i hope you like it.
Electric circuit

An electric circuit is consists on three wires. The phase wire which is directly connected to the switch and second wire which is connected to the electric load or device and third wire is connected the neutral side of supply to electric device or apparatus.


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Posted at 10:49 PM |  by Unknown
KWH:
It is the unit of power. It is also known as Board Of Trade.

Unit:
I B.O.T unit = IKWH.
B.O.T or K.W.H = Total watts * Hours * Days/100o=unit.

B.O.T unit is commercially unit.
"If we connect a 1000w electric lamp through voltage source for one hour the power dissipated in the circuit is IKWH or one unit"



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What is KWH (Board Of Trade)?

KWH:
It is the unit of power. It is also known as Board Of Trade.

Unit:
I B.O.T unit = IKWH.
B.O.T or K.W.H = Total watts * Hours * Days/100o=unit.

B.O.T unit is commercially unit.
"If we connect a 1000w electric lamp through voltage source for one hour the power dissipated in the circuit is IKWH or one unit"



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2 comments
Posted at 10:48 PM |  by Unknown
Energy: The ability to doing of work is called energy. The letter (W) is used to symbolize energy.
The unit of energy is the joule, which is denoted by (j).
"One joule is the amount of energy converted into heat when voltage of I volt existing across the resistor and as a result one coulomb of charge moves through a resistor"


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What is Energy?

Energy: The ability to doing of work is called energy. The letter (W) is used to symbolize energy.
The unit of energy is the joule, which is denoted by (j).
"One joule is the amount of energy converted into heat when voltage of I volt existing across the resistor and as a result one coulomb of charge moves through a resistor"


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1 comment
Posted at 10:48 PM |  by Unknown
Insulator are those materials who offer a great resistance against electric current. In other words the electrical conductivity of insulator material is very low. But if we increase the P.D step by step a point occurred where insulator becomes a conductor. There are many types of insulator material for example glass, mica, silk, dry paper. oil etc.
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What is Insulator?

Insulator are those materials who offer a great resistance against electric current. In other words the electrical conductivity of insulator material is very low. But if we increase the P.D step by step a point occurred where insulator becomes a conductor. There are many types of insulator material for example glass, mica, silk, dry paper. oil etc.
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Posted at 10:47 PM |  by Unknown
The causes the flow of electrons in conductor, when circuit is closed is known as voltage. 
The unite of voltage is volt, and we use the electric circuits the voltmeter for measurement of voltages, which we use always in parallel to electric load.
The value of voltage is one volt across a circuit when due to that voltage a current of one ampere passes through it and circuit has a resistance of one ohm.
The value of voltage that will exist across a circuit is given by the below equations.
Voltage


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What is Voltage?

The causes the flow of electrons in conductor, when circuit is closed is known as voltage. 
The unite of voltage is volt, and we use the electric circuits the voltmeter for measurement of voltages, which we use always in parallel to electric load.
The value of voltage is one volt across a circuit when due to that voltage a current of one ampere passes through it and circuit has a resistance of one ohm.
The value of voltage that will exist across a circuit is given by the below equations.
Voltage


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Posted at 10:47 PM |  by Unknown
Fuse :
            "Fuse is a device consisting of a melt-able metal link inside a casing"
The low-voltage fuse consisting of a short length of conductor, which can carry a certain amount of current indefinitely but will fuses if the current is greater. In domestic wiring rewire able fuse is used.
H.R.C fuse are commonly used in commercial wiring.
Fuse elements are made in a varicty of shapes, to produce either quick heating melting action. Besides its current rating, every fuse also has a voltage rating.
The fuse voltage rating specifies the maximum allowable source voltage of the circuit in which the fuse is used.
Fuse

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What is Fuse?

Fuse :
            "Fuse is a device consisting of a melt-able metal link inside a casing"
The low-voltage fuse consisting of a short length of conductor, which can carry a certain amount of current indefinitely but will fuses if the current is greater. In domestic wiring rewire able fuse is used.
H.R.C fuse are commonly used in commercial wiring.
Fuse elements are made in a varicty of shapes, to produce either quick heating melting action. Besides its current rating, every fuse also has a voltage rating.
The fuse voltage rating specifies the maximum allowable source voltage of the circuit in which the fuse is used.
Fuse

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Posted at 10:46 PM |  by Unknown
Conductor is a path who offers little resistance, conductor carrying therefore in conductor materials current flow easily. In conductor material there are many free electrons. When we apply a P.D across it these free electrons moves very quickly; as a result current flow through this conductor.
There are many conductor materials such as gold,aluminum,copper,iron etc.
Gold is the best conductor for flowing current.



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What is Conductor?

Conductor is a path who offers little resistance, conductor carrying therefore in conductor materials current flow easily. In conductor material there are many free electrons. When we apply a P.D across it these free electrons moves very quickly; as a result current flow through this conductor.
There are many conductor materials such as gold,aluminum,copper,iron etc.
Gold is the best conductor for flowing current.



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Posted at 10:46 PM |  by Unknown
Resistance is the property of a substance, which opposes the flows of electricity through it. Every material offers some resistance or opposition to the flow of electric current through it.
If current can pass through an electrical component easily it means that component has a small resistance. And if it is difficult for electric to pass through a component it means that component has a large resistance or offers a great resistance to flow of electric current through that component.
The unit of resistance it ohm. Resistance donated by (R), the value of resistance one ohm. At that time when due to (IV) the current passes through the circuit is (IA).
In short a very thing which opposes the current is called the resistance.


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What is Resistance?

Resistance is the property of a substance, which opposes the flows of electricity through it. Every material offers some resistance or opposition to the flow of electric current through it.
If current can pass through an electrical component easily it means that component has a small resistance. And if it is difficult for electric to pass through a component it means that component has a large resistance or offers a great resistance to flow of electric current through that component.
The unit of resistance it ohm. Resistance donated by (R), the value of resistance one ohm. At that time when due to (IV) the current passes through the circuit is (IA).
In short a very thing which opposes the current is called the resistance.


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Posted at 10:45 PM |  by Unknown
Power: The rate of doing work is called power.
                                 P=w/t
Power is measured in watts (w).
The watt is a small unit, so generally it is expressed in kilowatts (1o3w). mega watts(106w) etc.
"In electric circuit if voltage of (I) volt is present and the value of current is (I) ampere the power is one watt in this circuit.
                               P=VI
                            P=I x I = IW



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What is Power?

Power: The rate of doing work is called power.
                                 P=w/t
Power is measured in watts (w).
The watt is a small unit, so generally it is expressed in kilowatts (1o3w). mega watts(106w) etc.
"In electric circuit if voltage of (I) volt is present and the value of current is (I) ampere the power is one watt in this circuit.
                               P=VI
                            P=I x I = IW



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No comments
Posted at 10:44 PM |  by Unknown
The famous ohm's law was stated in 1827 by Dr. George Simon ohm. This law is fundamental and universal, it applies only to direct current (DC).
Ohm's law is the mathematical statement of the relationship between current,voltage and resistance.
George siemen's ohm is the scientist who gives the statement about ohm law.
"According to ohm's law electric current is directly proportional to resistance if temperature remains constant.
Ohm's Law
If the voltage becomes doubled, the current is also doubled. If we change the resistance by certain factor then current is decreased or increased by the same factor.
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Ohm's Law

The famous ohm's law was stated in 1827 by Dr. George Simon ohm. This law is fundamental and universal, it applies only to direct current (DC).
Ohm's law is the mathematical statement of the relationship between current,voltage and resistance.
George siemen's ohm is the scientist who gives the statement about ohm law.
"According to ohm's law electric current is directly proportional to resistance if temperature remains constant.
Ohm's Law
If the voltage becomes doubled, the current is also doubled. If we change the resistance by certain factor then current is decreased or increased by the same factor.
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Posted at 10:44 PM |  by Unknown
"It is a device for making and breaking a circuit both under normal and abnormal conditions.
The function of a circuit breaker is to make and break a circuit under high-load, heavy load and short circuit condition, although the making and breaking of S.C currents has the major. influence on the size and rating of the circuit breaker. Most circuit breaker's are manual reset type. In the manual reset type circuit breaker when over current causes the breaker to trip.

Circuit Breaker

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What is Circuit Breaker?

"It is a device for making and breaking a circuit both under normal and abnormal conditions.
The function of a circuit breaker is to make and break a circuit under high-load, heavy load and short circuit condition, although the making and breaking of S.C currents has the major. influence on the size and rating of the circuit breaker. Most circuit breaker's are manual reset type. In the manual reset type circuit breaker when over current causes the breaker to trip.

Circuit Breaker

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Posted at 10:43 PM |  by Unknown
A distribution fuse board (D.F.B) may be defined as a unit which consist one or more protective devices against over current. An installation in a house will usually require only one distribution fuse board (D.F.B) .
The supply to the D.F.B (distribution fuse board) is controlled by a consumer's main switch. Large installations will of course, have several distribution fuse boards each supplying one separate section of the premises.
In such cases, the incoming mains are taken to a main distribution fuse board, where they connect to a number of large fuses protecting main sub-circuits.
Distribution Fuse Board (D.F.B)

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What is Distribution Fuse Board (D.F.B)?

A distribution fuse board (D.F.B) may be defined as a unit which consist one or more protective devices against over current. An installation in a house will usually require only one distribution fuse board (D.F.B) .
The supply to the D.F.B (distribution fuse board) is controlled by a consumer's main switch. Large installations will of course, have several distribution fuse boards each supplying one separate section of the premises.
In such cases, the incoming mains are taken to a main distribution fuse board, where they connect to a number of large fuses protecting main sub-circuits.
Distribution Fuse Board (D.F.B)

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1 comment
Posted at 10:42 PM |  by Unknown
Bus Bar Chamber
"Bus Bars are conductors to which a number of circuits are connected"
Bus bars chambers which feed two or more circuit must be controlled by a switch, C.B, link or fuse enable them to be disconnected from the supply system.
A bus is a junction of one or more than one incoming and outgoing circuits. The bus bar has a metal-clad construction. In large installations bus bars are used commonly. Bus bars are operates at constant voltage. Bus bars are insulated from earth and also from each other. Bus bar chamber consist of several metal-clad buses copper and aluminum are commonly used  materials for bus-bars.


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What is Bus Bar Chamber?

Bus Bar Chamber
"Bus Bars are conductors to which a number of circuits are connected"
Bus bars chambers which feed two or more circuit must be controlled by a switch, C.B, link or fuse enable them to be disconnected from the supply system.
A bus is a junction of one or more than one incoming and outgoing circuits. The bus bar has a metal-clad construction. In large installations bus bars are used commonly. Bus bars are operates at constant voltage. Bus bars are insulated from earth and also from each other. Bus bar chamber consist of several metal-clad buses copper and aluminum are commonly used  materials for bus-bars.


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16 comments
Posted at 10:42 PM |  by Unknown
Fused switches :
Fused switches, consist of fuses which are mounted on a common base and usually in a metal case. There are several types of fuses available in market, eg rewire able fuse, cartridge fuse, H.R.C fuse etc.
The fuses are mainly of the current limiting high interrupting capacity.
There is wide variety of low-voltage fuses. These rating star from a few (Amp) to hundred (Amp).

Fused switches

                                    
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What is Fused switches?

Fused switches :
Fused switches, consist of fuses which are mounted on a common base and usually in a metal case. There are several types of fuses available in market, eg rewire able fuse, cartridge fuse, H.R.C fuse etc.
The fuses are mainly of the current limiting high interrupting capacity.
There is wide variety of low-voltage fuses. These rating star from a few (Amp) to hundred (Amp).

Fused switches

                                    
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Posted at 10:38 PM |  by Unknown

Sunday, October 13, 2013

Ohm's law tells us that in voltage are high the current will be high and when resistance is high then voltage and current will be low.
Note that Ohm's law only apply on DC current and it is not apply on AC current.

In this class i am going to share with your a figure in which i shown all Ohm's law formulas.

Ohm's law formulas
Share it with your friends and if you have any question then do ask me in comments section.


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All Ohm's law formulas

Ohm's law tells us that in voltage are high the current will be high and when resistance is high then voltage and current will be low.
Note that Ohm's law only apply on DC current and it is not apply on AC current.

In this class i am going to share with your a figure in which i shown all Ohm's law formulas.

Ohm's law formulas
Share it with your friends and if you have any question then do ask me in comments section.


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No comments
Posted at 3:48 AM |  by Unknown
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