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ELECTRIC CURRENT.pptx

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ELECTRIC CURRENT.pptx

This is a presentation on electric energy

This is a presentation on electric energy

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ELECTRIC CURRENT.pptx

1. 1. NATURE OF ELECTRIC CURRENT Group 6
2. 2. “IF YOU GUESS ME, YOU'LL LOVE ME”
3. 3. •The class will group into two. Each group will have representative to act out the word provided by the presenters. Everyone can answer by raising their hands and by saying “I love You”. Each group will just have 30 seconds to answer each word
4. 4. ELECTRIC CURRENT A flow of charge from one place to another. The unit is Ampere, which equal to a flow of 1 coulomb per second
5. 5. MOVING CHARGES AS A CURRENT  Its described as a stream of moving charges.  May range very small currents such as the nerve impulses to a large as the solar wind imitted by the sun.  There must be a “net” flow of charges towards one direction.
6. 6. WHEN MOVING CHARGES IS NOT A CURRENT When there is no net flow of charge even though there are actual movement Example: • Electrons of a copper conductor in absence of electric potentials. • Electrons just move randomly the charge flowing charge flowing to one direction is equal to those flowing to the other direction.
7. 7. ELECTRIC CURRENT IN A CONDUCTOR  An isolated conductor in absence of electric potential contains free flowing electrons but no electric current v Isolated conductor Charges
8. 8. CONTINUATION:  A conductor connected to a dry cell or battery has the necessary electric potential to influence the flow of charges towards one direction, hence producing current. v Isolated conductor Charges battery
9. 9. CONTINUATION: Electric current (/) is defined as the amount of charges passing through a hypothetical plane intersecting the conductor per unit of time. Its unit is coulomb per second (C/s), also called ampere (A).
10. 10. CONTINUATION: plane plane
11. 11. CURRENT IS A SCALAR QUANTITY Electric current is moving along a conductor has only two possible directions. Electric current are scalars. Adding and Subtracting the current does not consider the orientation of the conductor in space
12. 12. DIRECTION OF CURRENT In reality, electric current are movement of electrons along the conductor. For historical reason, current is treated as flow of positive charges to the direction opposite that of the actual movement of electrons.
13. 13. CONTINUATION:  These positive charges are not actual particles. They are called holes, vacant spaces where there should be an electron. The charge of hole is +1.6 x 10-19C.  Electrons are known as negative charge carriers. Holes are known as positive charge carriers.
14. 14. TYPES OF CURRENT Direct current • The direction of current is constant. • The graph of current vs time is a straight line. Developed by Thomas Alva Edison • Soon replaced by alternating current as primary means of transmitting electricity, but still used in battery operated devices.
15. 15. CONTINUATION: • Alternating Current • The direction and magnitude of the current continously changes between two extremes. • The graph of current vs time is sinosoid. • Developed by Nikola Tesla and George Westinghouse, forming rivalry with Thomas Edison on War of the Currents. • The most commonly used method of electric transmission today.
16. 16. LEARNING ACTIVITY Based on the knowledge that you get and understand in our discussion you will be group into four. Each group will perform their assigned task. You only have 15 minutes to do this • Group 1- poem • Group 2- song • Group 3- Acting • Group 4- Poster
17. 17. CRITERIA Content- 50% Creativity-25% Relevance-25% Total- 100%
18. 18. ASSIGNMENT Create an illustration about the flow of electric current in a conductor
19. 19. THANK YOU!