This is a presentation on electric energy

2. NATURE OF ELECTRIC
CURRENT
Group 6

3. “IF YOU GUESS ME, YOU'LL LOVE ME”

4. •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

5. 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

6. 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.

7. 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.

8. 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

9. 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

10. 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).

11. CONTINUATION:
plane plane

12. 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

14. 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.

15. 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.

18. 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.

19. 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.

21. 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

22. CRITERIA
Content- 50%
Creativity-25%
Relevance-25%
Total- 100%

23. ASSIGNMENT
Create an illustration about the
flow of electric current in a
conductor

24. THANK YOU!