01 OHM's Law person to person performeds

Ohm's law

1. OHM's LAW
Electricity education
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2. How voltage, current, and resistance relate
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V
I
R P

3. OHM's LAW
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V = I x R (volt)
Voltage = Electric current x Resistance
I = V / R (Amper)
R = V / I (Ohm)
V
I
R P
V
I R

4. Calculation example
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V = 12V
I = ?
R = 3Ω
Battery
I = U / R
I = 12 / 3
I = 4 A
Ex. 1 V
I R

5. Calculation examples
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V = 36V
I = 4 A
R = ??
Battery
V = ??
I = 2 A
R = 7 Ω
Battery
Ex. 2
R = V / I
R = 36 / 4
R = 9 Ω
Ex. 3
V = R x I
V = 7 x 2
V = 14 V
V
I R

6. An analogy for Ohm's Law
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V = I x R
V = I x R
V = I x R
Fig. 1 Fig. 2
Fig. 3

7. OHM's LAW - REVIEW:
Voltage measured in volts, symbolized by the
letters “E" or "V".
Current measured in amperes, symbolized by
the letter "I".
Resistance measured in ohms, symbolized by
the letter "R".
Ohm's Law: V = I x R ; I = V / R ; R = V / I
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