Principles of Transformer

Tuesday, February 9, 2010

•Difference between Step-up and Step-down Transformer.

     Step-up Transformer- if the number of loops in the secondary coil is greater than that in the primary coil so that the induced voltage is greater than the input voltage.

     Step-down Transformer- a transformer that has less loops in the secondary than that in the primary, the induced voltage in the secondary coil is less than that in the primary coil.

•Appliances or Equipment that requires transformers.

       The appliances or equipment that requires transformers are Television, Sound system, Refrigerator, and etc., which  needs a voltage except 220 V source.

•Relation of the voltage and current in the primary and secondary coils to the number of turn in each.

       If the number of coils in the primary coil is lesser,  its voltage and current is also lesser and if it have many loops its voltage and current is greater because the more the number of coil the more the current and voltage flows and has a greater supply. And the same as in the secondary coil.





My Reaction about the article "NZ student accepts $32,000 bid for virginity"

Monday, February 8, 2010

Actually, this article is so surprising in the sense that, a particular student bidding her own virginity that can cause her in danger like having an HIV disease and any transmitted disease. As you read it, she give her own virginity to have a money that could help her for paying her tuition fees. And I think it is very common problem in our generation which is the financial aspects because of lacking in money. And in order to have a good education that could make you better in the future you will do anything to have it. Just like what happen in the student in New Zealand. And don't think if it is the best solution because for me its just like selling your spirits in a devil. Besides, you can take another solution for that particular problem that could not put you at risks.

 Click Here!!!!!

Electromagnetic Induction

Monday, February 1, 2010

1.Materials: magnetic coil, compass needle, and battery 2. Electromagnetic Induction occurs when the complete materials are set and when you drag the magnet there is a changes or movement in a compass needle. 3. The compass needle will move if it is in switch on and also there is no movement if it is switch off.