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The simplest example of Ohm's Law is an old fashioned dimmer switch in your house. As you turn the dimmer switch up, the light gradually brightens until it reaches full intensity. Conversely, you can turn the dimmer switch down, and the light gradually darkens.
The dimmer switch is a variable resistor. That is, the electrical resistance of the dimmer switch changes as you rotate the knob. Ohm's Law tells us that the flow of current is directly proportional to the voltage, and inversely proportional to the resistance. Since the voltage across the switch doesn't change, the only thing that changes is the resistance when you turn the dimmer switch knob.
As you turn the dimmer switch down, you are actually increasing the resistance of the dimmer switch. The current is inversely proportional to the resistance, so as the resistance goes up, the current (flow of electricity) goes down, and the light gets darker. This is an example of Ohm's Law.
NOTE: This example applies to rheostat switches, and does not apply to modern current-clipping dimmer switches. Rheostat switches are seldom used now because they can overheat, but the illustration is still a useful example of Ohm's Law.
Wiki User
∙ 13y ago
Wiki User
∙ 10y agoNot all mathematical equations do that. Just this one:
V = I*R
Voltage difference equals current times resistance.
AnswerThere is NO 'Ohm's Law formula'! Ohm's Law is simply a statement of the relationship between voltage and current in somematerials. What is mistakenly called the 'Ohm's Law formula' is actually derived from the definition of an ohm.
Wiki User
∙ 13y agoOhm's Law
Voltage = Current x Resistance
V = I x R
R = V/I and the unit of resistance is called an Ohm.
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Can i plug my 4 ohms Guitar amp into 16 ohms speakers?
That should be safe; although you won't get the best out of the loudspeakers. It's a myth. There is really no 16 Ohm amplifier on the market. And there never was. The amplifier will have an output impedance of around 0.04 ohms. In hi-fi we have always impedance bridging. Zout << Zin. That means the output impedance of the amplifier is much less than the input impedance of the loud speaker. The damping factor Df = Zin / Zout tells you what Zout is. Zout = Zin/Df. If the damping factor Df = 200 and the loudspeaker impedance is Zin = 16 ohms, the output impedance of the amplifier is Zout = 16 / 200 = 0.08 ohms. You see, there is no "16 ohm amplifier" on the market with a 16 ohm output impedance. Scroll down to related links and look at "Voltage Bridging or impedance bridging - Zout < Zin".
What is an example of traffic law?
Bicycle ordinance violations, blocking or retarding traffic, and crossing yellow line, driving left of center.
What would happen if a resistor was not included in a circuit?
The short answer is that the circuit will have a very high level of current or the maximum amount that the voltage source can provide. Long Answer When analyzing electrical circuits the resistance of the wires is often ignored because it is so small and it makes the calculations easier. In reality all wires or conductors have a certain amount of resistance that affects the circuit. This makes it impossible to have a circuit without any resistance. Following that, Ohm's law can be used to describe what will happen in any circuit. Ohm's Law: Voltage = Current * Resistance or V = I * R Example: Very simple circuit A 12 volt car battery has a wire connecting the positive and negative terminals directly. The resistance of the wire is .001 ohms. What is the current? I = V/R I = 6volts / 0.001 ohms I = 6000 amps Of course, a car battery cannot provide this much current, so the maximum amount that it provide can will flow through the wire. Also, the wire will surely burn up from the high levels of current.
Can you wire four sixteen ohm speakers to eight ohms?
No, you can't get 8 ohms with 4 16-ohm speakers. Here are the possible wirings: +o-+o-+o-+o- all in series: 64 ohms |+o-+o-| |+o-+o-| series parallel: 16 ohms |+o-| |+o-| |+o-| |+o-| all in parallel: 4 ohms .... Well in the conventional way it is not possible. But think of the speakers as load attached to the secondary of some transformer while the primary coil is attached to the amplifier block before (a tuned amplifier type). If we adjust the turns ratio as n = primary:secondary = Sqrt(2):1, then the eefective load on the amplifier would be Reff = n^2*Rp. Now as pointed in the parallel connection, Rp = 4. So, Reff = 8 Ohm.
How many volts equal one watt?
They are different terms. Amps refer to the amount of energy, volts refers to electrical "potential". Amps * Volts = Watts. So if you don't already know a little about electricity, it just became more confusing. One volt of power into 1 ohm resistance equals 1 amp of flow Volts = electrical pressure, Amps = current flow, ohms = amount of resistance in the circuit. dividing voltage by resistance gives you the amount of current. Dividing voltage by current gives you resistance. Muntiplying current by resistance gives you voltage If you know any 2 values, you can calculate the third. See "Ohms Law" on the internet for further reading.
What is the example of worded using ohms law?
amp*volts=watts
What is a scientfic law?
The Law of Gravity is one example. - - - - - - - - Newton's laws of motion would be another, as would be Ohms Law.
How do you calculate 1.67 ohms?
ohms law.
Example of a scientific law?
Current is proportional to the voltage provided the conductor is at the same temperature - Ohms Law There you go, hope this helped
How do you find conductance using ohms law?
To find the conductance using ohms law,you take the inverse of the resistance(/R)
What does the i stand for in ohms law?
Current
Is ohms law heat and light?
No.
Do transformer violates ohms law?
no
Formula for ohms law?
ohms=amps/volts Amps= volts/ohms Volts = Amps*Ohms
What are the Limitations elements of ohm's law?
Ohms law does not consider inductance
Does the diode satisfy ohms law Explain?
no
Did you know the Laws of resistance?
Ohms law.
