### Concept of AC and DC Current , Alternating , Direct , Example

In this article you will see about concept of AC ( Alternating Current ) and also concept of DC ( Direct Current ) Now days electricity is generated as AC (alternating current). The power generated is transmitted, distributed and mostly used as AC. In this article, the fundamental concepts of AC and AC circuits are discussed below.

### Introduction

We have determined that the electric current drawn from a battery is unidirectional.The polarity of the battery is marked + Ve and - Ve. When a particular load, called a lamp (denoted by its resistance) is connected to the two terminals of the battery, a current flows through the lamp in a particular direction.

#### constant or constant-value direct current

Along with the current, its direction also remains constant with respect to the time constant of the battery voltage. Such a current is known as a constant or constant-value direct current.

#### Definition of direct current

A direct current is a unidirectional flow electric charge. An electrical cell is a major example of DC power.

Direct current can flow
• Through a conductor as a wire .
• It can also flow through an electron .
• It flow through ion beam .
• through a semiconductor.
• It can also flow through insulator, or even vacuum as in electron or ion beams.
One question may comes in your mind that "Are batteries AC or DC?"

Answer of this question is battery is Direct Current (DC).By using dc to ac to dc converter which is known as inverter.

Q.Which is dangerous between AC and DC?
Answer : Alternating current is more dangerous than direct current .It is said that ac is four to five time even some cases 10 time more dangerous than dc

## Concept of AC and DC

When the direction of current is continuously changed through a circuit, such current is called (ac) alternating current.The polarity of the AC supply source changes alternately and alternately flows the current through the load associated with the terminals.

• #### Direct current of constant magnitude :In given figure below shows the nature of current. when the switch is 'ON' and 'OFF' at regular intervals.

Using the reverse switching arrangement, as shown in the diagram, we can flow an AC through the load.

Here, through a reverse switch, supply terminal 1 is connected to load terminal 2 to and supply terminal 2 is connected to load terminal 1 terminal.

It may be noted that if the period of the current in both directions is constant, the load current will be alternating in nature and its wave shape will be square or rectangular type as shown in the figure below.

#### Conclusion

I hope you like like this information about concept of AC and DC in details .If you have any question regarding this topic you can ask by commenting us .

### Biasing of p–n Junction | Forward and Reverse-biased |

Biasing the p-n junction means applying some external voltage to both sides of the p-n junction. Reverse-biased junction and forward-biased junction are two types of biased junction. You should have also good understanding of  N-Type and P-Type Semiconductor before moving towards this topic.

Biasing of p–n Junction Biasing of a p–n junction means uses of some external voltage across the two sides of the p–n junction. It is divided into two groups
Forward-biased junction : When the p-side of junction  is connected to the positive terminal of a battery and the n-side of junction is connected to the negative terminal, the p–n junction is said to be a forward-biased junction. Reverse-biased junction :If the positive terminal of the battery is connected to the n-side of junction and the negative terminal on the p-side, the p–n junction is said to be a reverse-biased junction.Now we will see about forward and reverse-biased junction in detail.
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If you are search about how to study science so i am going to share with you some tips that help you to study science in effective way. In this post, we are going to see what you should keep in mind while studying science. Because of which you can complete the syllabus of your science subject in the least time and comfortably and can  study  well with full concentration. So I will tell you five such tips with which you can study science comfortably.

How to study scienceWhether you are a student of class 10, whether in class 12 or any class, while studying science, these five tips will help you to get good score in science as well as improving your interests in science .

Goal Setting : By Goal Setting, I mean that when you sit for study, you have to set this target that today I will read so much chapter or today I will get up after reading so much content.This thing will do the work of positive motivation and will push you that we have to study till then. Until my target is achieved.
Rea…

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We see applications of electricity all around us.Today we will discuss about the need to study electrical  engineering .We observe the presence of electricity around us. This is really amazing and it is also interesting to know how mankind can power its use. All electronic and electrical products operate on electricity.  Be it your computer system, cell phone, home entertainment system, lighting, heating and air conditioning system - all are examples of electrical applications. The application of electricity is infinite and often extends beyond our imagination.

The need to study electrical engineering We have need to study electrical engineering because of following reason .Which is discussed below in given points.
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