CREATE YOUR IDEAS FOR YOUR FUTURE
Ohm's Law
Loading...
by S.ESENDENİZ KALKANLoading...
TeacherLoading...
Kadri Saman MTSO Vocational and Technical Anatolian High SchoolLoading...
What is Ohm’s Law?Loading...
Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.To students of electronics, Ohm's Law (V = IR) is as fundamentally important as Einstein's Relativity equation (E = mc²) is to physicists.
V = I x R
When spelled out, it means voltage = current x resistance, or volts = amps x ohms, or V = A x Ω.
V=I.R
V
I
R
I=V/R
R=V/I
R=V/I
Example 1: Voltage (V) and resistance (R) are known.
V= 12 V
What is the current in the circuit?
V=I.R
I=V/R
= 12/6= 2 A
I=V/R
= 12/6= 2 A
Example 2: Voltage (V) and current (I) are known.
V= 24 V
What is the resistance created by the lamp?
V= I.R
R=V/I
=24/6= 4 Ω
R=V/I
=24/6= 4 Ω
Example 3: Current (I) and resistance (R) are known. What is the voltage?
V=?
V=I.R
V=5.8=40 V
V=5.8=40 V
Ohm's Law Formula Wheel
Below is a formula wheel for Ohm's Law relationships between
P, I, V, and R. This is essentially what the calculator does, and is just a representation of the algebraic manipulation of the equations above.
To use the wheel, choose the variable to solve for in the middle of the wheel, then use the relationship for the two known variables within the cross section of the circle.
Below is a formula wheel for Ohm's Law relationships between
P, I, V, and R. This is essentially what the calculator does, and is just a representation of the algebraic manipulation of the equations above.
To use the wheel, choose the variable to solve for in the middle of the wheel, then use the relationship for the two known variables within the cross section of the circle.