Ohm's Law 

As the our discussion continues, the last topic we have tackle is the Ohm's Law which named from George Simon Ohm. This lesson applies the topic we have learned in Physics 2 which is Kirchhoff Law which is presented this kind of example.

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The Ohm's States that: 

The Voltage V across a resistor is directly proportional to the current i flowing through the resistor 

Simple Application :

The application of ohms law in a very simple example is that ... when you push a heavy material, you will have to exert a force in order to move the material, but when the material is heavier that you'd expect, you exert more power to push the material. As sir Jay Villan our teacher explain. 

Upon the observation, the force exerted by a person that causes the table to move is the voltage , and the motion or the movement that is causes to move is the current (i), and the material which is heavier is the resistance which the person need more power to push the material.

Ohm's Law Formula 

the formula for the ohm's law is came from the formula V = IR which you can derive. If you will find the voltage you will use V=IR, and if you will find the current the formula will be I=V/R. And if you will find the resistance the formula will be R=V/I which the answer will be measured in Ohms. Which states that "The resistance R of an element denotes its ability to resist the flow of the electric current, it is measured in ohms".

Sir jay also discuss the flow of a circuit which i think on my understanding, there are two types , a SHORT circuit and a OPEN circuit.

Short Circuit:

A short circuit defines that a circuit element with resistance approaches to zero.

Open Circuit:

A open circuit is circuit element resistance approaching infinity which means that there is no current flowing through because of its open circuit.

TYPES OF RESISTOR

A resistor is either fixed or variable. Most resistor are of the fixed type, which means their resistance remains constant. the two common types of fixed resistors are WIREWOUND and COMPOSITION. The composition resistors are used when large resistance is needed. A common variable resistor resistor is known as a "potentiometer",it has three-terminal element with a sliding contact or wiper in which the resistance vary of changed. 

example:

Conductance

       Conductance is the ability of an element to conduct electric current; it is measured in mhos or siemens.

A useful quantity in circuit analysis is the reciprocal of resistance R, known as conductance and denoted by G:

G=I/R=i/V

Resistor Color Coding:

how to memorize the resistor code! click here

This blog contains the lesson tackle in our Circuits 1 with covers up to the finals topics ..but it is upated weekly by which it is one by one review the lesson the topics that our professor has tackled to us .. 

Chapter 1 :

what is a circuit ?

A lot of appliances and gadget are widely are expanding and most of it usually are in our house in all in our environment which serves us part of our daily life. And through that appliances and gadget we have .. i have learned most of it is applied by the circuits.

A circuit contains a power supply which provides electricity in a circuit and the electricity that flows in a circuit is called current. when the power supply gets electricity ,the current that flows through a socket in an alternating current, and is converted through direct current in which the electricity that flow in an electrical device by the use of power supply ..

Charge- A form of charge, designated positive, negative, or zero found on the elementary particles that make up all known matter. Particles with electric charge interact with each other through the electromagnetic force creating electric fields, and when they are in motion, magnetic fields

Current - An electric current is a flow of electric charge. Electric charge flows when there is voltage present across a conductor.

Voltage - is a representation of the electric potential energy per unit charge. Voltage is a scalar quantity. The SI unit of voltage is the volt, such that 1 volt = 1 joule/coulomb.

Power - electric power is the rate at which electric energy is transferred by an electric circuit. The SI unit of power is the watt, one joule per second.

example of a simple circuit

CIRCUIT ELEMENT 

An element is the building block of a circuit and Electric circuit s the interconnecting of the elements.

Types of Elements

*Active Elements - capable of generating energy which has a negative power 

*Positive Energy - which absorbs energy example of it are resistors, capacitor, inductors.

Types of Sources 

independent source - does not depend to other element to supply Voltage or current.

Dependent source - does depend on the other element of the circuit.