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FORMAT ALegend:
Purple - resistance Yellow - power/Wattage
Green - current/Amps
Red - Voltage
Ohm's Law is the fundamental formula for electronics'
Voltage,
current,
resistance, and
power.
Voltage is expressed as the letter
V or
E Voltage's technical name is called
electromotive force or EMF
current or
Amps is expressed as the letter
I or
Aresistance is expresses as the letter
R resistance's technical name is opposition to electron flow.
power or
Watts is expressed as the letter
W or
Pcurrent is normally called
Amps.power is also normally called
Watts.
All of The Ohm's Law Formulas are:
To Find current-- Voltage Divided By
resistance:
I = V / R power Divided By
Voltage:
I= P / V Square Root of
power Divided By
resistance:
I = √(P / R)Electric current is the flow of an electric charge.
To Find VOLTAGE -- power Divided By
current:
V = P / I resistance times
current:
V = R * I Square Root of
power times
resistance:
V = √(P * R)
To Find POWER -- Voltage Times
current:
P = V * I Voltage Squared Divided by
resistance:
P = V2 / R resistance Times
current Squared:
P = R * I2
To Find RESISTANCE -- Voltage Divided By
current:
R = V / I Voltage Squared Divided by
power:
R = V2 / P power Divided by
current Squared:
R = P / I2
BEGINNER'S PRACTICE: | #1 GIVEN:
Resistance = 274 Ohms Voltage = 14.5 Volts Find my CURRENT and POWER. |
| #2 GIVEN:
Resistance = 8560 Ohms (8.560K Ohms) Voltage = 5 Volts Find my CURRENT and POWER. |
| #3 GIVEN:
Resistance = 1.2K Ohms (or 1200 Ohms) Voltage = 12 Volts Find my CURRENT and POWER. |
| #4 GIVEN:
Resistance = 453 Ohms Current = 3 Amps Find my VOLTAGE. |
| #5 GIVEN:
Resistance = 6.7K Ohms Power = 37 Watts Find my CURRENT and VOLTAGE. |
| #6 GIVEN:
Power = 1.3 Watts Current = 400mA (or 0.4 Amps) Find my VOLTAGE. |
BEGINNER'S PRACTICE ANSWERS:
1.] [spoiler]
(Voltage=14.5 VOLTS) (Resistance=274 OHMS) (Current=) (Power=)[/spoiler]
2.] [spoiler]
(Voltage=) (Resistance=8560 OHMS) (Current=) (Power=)[/spoiler]
3.] [spoiler]
(Voltage=12 Volts) (Resistance=1200 Ohms) (Current=) (Power=)[/spoiler]
4.] [spoiler]
(Voltage=) (Resistance=453 Ohms) (Current=3 Amps)[/spoiler]
5.] [spoiler]
(Voltage=) (Resistance=6700 Ohms) (Current=) (Power=37 Watts)[/spoiler]
6.] [spoiler]
(Voltage=) (Current=0.4 Amps) (Power=1.3 Watts)[/spoiler]
FORMAT BOHM'S LAW
In this Article:- What is Ohm's Law? Ways to remember Ohm's Law
- An explanation of how it works
- Examples and Practice Problems
Section 1:Ohm's Law is the fundamental formula for electronics: Voltage, current, resistance, and power.
Abbreviations expressed in Ohm's Law are:
V or E = Voltage also known as Electromotive Force
I = Current
R = Resistance
W = Power
The easy ways to remember basic Ohm's Law are
V = I * R and
P = I * E because you can algebraically manipulate the formula if you need to solve for a different value. If you have 2 of the given values you can solve for any other value.
You can easily remember the power formula by P = I * V or the 'pie' method P = I * E because the abbreviation V is the same as E.
Section 2:Voltage, Current, and Power are all directly proportional.
If resistance stays the same and voltage decreases therefore your current will decrease.
Ohm's Law works in series circuits and parallel circuits.
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Section 3: | | | |
[spoiler]
(Voltage=14.5 VOLTS) (Resistance=274 OHMS) (Current=) (Power=)[/spoiler] | [spoiler]
(Voltage=) (Resistance=8560 OHMS) (Current=) (Power=)[/spoiler] | [spoiler]
(Voltage=12 Volts) (Resistance=1200 Ohms) (Current=) (Power=)[/spoiler]
| [spoiler]
(Voltage=) (Resistance=453 Ohms) (Current=3 Amps)[/spoiler]
|