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Sabado, Hunyo 28, 2014

BLOG 2 - ELECTRIC CIRCUITS 1

This blog contain about ohm’s law


What do you usually think when you are asked, what is ohm’s law? If you think of a difficult, boring, and useless topic then, you should think again. You know why? All of us should have knowledge of electrical quantities and unit, even the most common ones only, is important analyzing electrical circuits.

Understanding ohm’s law, although the three quantities, current, voltage, and resistance, are use differently, they related to its other this relationship is know us ohm’s law. Ohm's law state that the voltage V across a resistor is directly proportional to the current I flowing through the resistor.


The fundamental relationship between voltage, current and resistance - in an electrical circuit is called Ohm’s Law. All materials are made up from atoms, and all atoms consist of protons, neutrons and electrons. Protons have a positive electrical charge. Neutrons have no electrical charge while Electrons, have a negative electrical charge. Atoms are bound together by powerful forces of attraction existing between the atoms nucleus and the electrons in its outer shell.





Surface-mount technology - is a method for producing electronic circuits in which the components are mounted or placed directly onto the surface of printed circuit boards. An electronic device so made is called a surface-mount device.



Open circuit - an open circuit exists when there is a break or gap in the circuit.
Causes of open circuits;
  • ·        broken wire
  • ·         poor connection
  • ·         loose terminal
  • ·         blown fuse
  • ·         tripped circuit breaker
  • ·         faulty switch
  • ·         Blown globe





Short circuit - a short circuit exists when the original path of current flow is altered and a shorter than normal path for current flow exists.

Causes of short circuits;
  • ·         worn or damaged wiring insulation
  • ·         wire squashed or jammed between components
  • ·         tools dropped across or accidental contact between positive and negative
  • ·         incorrectly connected ammeter
  • ·         Active wire incorrectly connected or joined to neutral position




AN OVERVIEW FOR THIS WEEK

To start let's have a recap of what we did and learned for this week.

Every Monday, Wednesday and Friday is the class discussion and Tuesday is the laboratory.

Last Monday, June 23 2014 we had our class discussion. we tackled about Ohm's law and as what i had learned Ohm's law is a current directly proportional to the voltage and inversely proportional to the resistance.

In every daily living we are applying Ohm's law, though we did not recognized it but the fact is we applied circuits in our home the appliances that we are using as well as enjoying that makes our lives become more comfortable it has a current as well as voltage and it is important to know how it works.

On the following day our laboratory. It was Tuesday and our professor let us familiarized the different components ad equipment such as IC, digital multimeter, resistor, transistor and hindi ko na alam ang iba :) hahaha. After that we find the manufacturer, model number, type of power supply and sketch. 

Wednesday June 25, 2014 the class discussion again it was the continuation of last topic.