ppt Ohm's law

2. Fundamental units of electricity
• Voltage is the pressure that pushes current to flow within
a load through a conductor
• Current is the flow of electrons in a circuit
• Resistance is the opposition of the flow of electrons in a
circuit.
• Power is the product of work done

3. OHM’S LAW

4. OBJECTIVES
• Define Ohm’s Law;
• Solve problems using Ohm’s Law;
• Appreciate the use of Ohm’s law in measurement and
calculation of electrical load; and
• Practice accuracy in computation.

5. What is Ohm’s Law?
• states that the current in the circuit is directly proportional
to the voltage and inversely proportional to its resistance.

6. Where:
• I is the current through the conductor in units of
amperes and the flow electrons in a circuit.
• V is the voltage measured across the conductor in units of
volts and an electrical pressure that pushes current to
flow within a load through a conductor.
• R is the resistance of the conductor in units of ohms (Ω)
and the opposition of the flow of electrons in a circuit.

7. • It also means that if the voltage increases the current also
increases and if the voltage decreases the current will also
decrease in which the resistance is constant.
• More specifically, Ohm's law states that the R in this relation
is constant, independent of the current.
• The law was named after the German physicist Georg Ohm,

8. How will you find the value of V, I,
and R using Ohm’s law?

10. Activity
• Group 1 will create an ohm’s law triangle using recyclable
materials found in their surroundings.
• Group 2 will create a yell about ohm’s law (you can use
the words voltage, current and resistance)
• Group 3 will create an ohm’s law triangle using perishable
materials found in their surroundings.

11. Rubrics:
Content - 50%
Neatness/Flawlessness - 30%
Uniqueness - 20%
TOTAL - 100%

12. • Group 1 - A light bulb is plugged into a wall outlet of 220 V
with a resistance of 0.02 Ω. What is the current of the circuit?
• Group 2 - A voltage 6.0V is connected to a lamp and a current
of 2.0 amperes flows. All the wires are resistance-free. What is
the resistance of the lamp?
• Group 3 - Another flash light bulb is rated to use 0.3 amps and
has a resistance of 4.0 Ω. How much voltage does this bulb
use?

13. Assignment
• Study in advance about the “Parts of the Multi-tester”

14. Concluding Activity
• Each group will be given strips of paper containing
word/s to complete the Ohm’s Law statement, and post
it on the space where they think it suits best.
• Then, each group will choose a representative to give a
brief explanation about their understanding on the topic.