1. Ohm’s Law
This presentation is designed to give
you the basic principles of Ohms’
Law

2. Learning Objectives- Upon
completion of this lesson…
 Students will know the various variables of
Ohm’s Law and what they signify
 Students will know the relationships of the
variable
 Students will know how to compute the
missing variable given the other two

3. V= Voltage
 Voltage is the amount of work done per unit
of charge
 Voltage is measured in Joules per Coulomb
 It is often thought of as the amount of
“energy” being applied
 The unit applied is “Volts/V”

4. I= Current
 Current is the flow of electrical charge
through a system
 Current is measure in amperes, which is
equivalent to 1 coulomb per second
 The unit applied is “Amperes/Amps”

5. R=Resistance
 Resistance is the opposition to the pass of
the electrical current.
 Resistance is caused by objects such as
lights or switches being applied to a circuit
 Resistance is measured in ohms
 The unit applied is “Ohms/Ω”

6. Ohm’s Law

7. Ohm’s Law

8. Solving for “V”
• Cover “V”
• Remaining formula is “I x R”
• Meaning as current or resistance increases
the voltage will increase
• Giving voltage a direct relationship to the
other two variables

9. Ohm’s Law

10. Solving for “I”
• Cover “I”
• Remaining formula is “V/R”
• Meaning as voltage or resistance increases
the current will decrease
• Giving current an inverse relationship to the
other two variables

11. Ohm’s Law

12. Solving for “R”
• Cover “R”
• Remaining formula is “V/I”
• Meaning as current or voltage increases the
resistance will decrease
• Giving resistance an inverse relationship to
the other two variables

13. Practice Problem

14. Ohm’s Law

15. Solution