Ohms Law Calculator

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How Ohms Law Calculator Works?

Calculates the following in a circuit using Ohm's law calculator.

It is possible to find the third value with this resistance calculator if two other values are known.


Follow these steps to use an ohm's law calculator.

Step 1: Calculate voltage by entering the resistance and current.
Step 2:Calculate the current by entering the resistance and voltage together.
Step 3:To determine resistance, enter the voltage and current into the calculator.


In order to get voltage, you don't have to push any buttons because the ohm calculator works in real-time.


In what ways might Ohm's law be applied?

Ohm's law is utilized in the process of validating the static values of circuit components such as voltage
supplies, current levels, and voltage drops.

Do you know how to use Ohm's law to determine the voltage drop?

Here's how to use Ohm's law to figure out the voltage drop across a resistor:

Is Ohm’s law Universal?

No. No, Ohm's law doesn't apply to everyone everywhere. Ohm's law only applies to ohmic conductors like iron
and copper, not non-ohmic conductors like semiconductors, therefore this is the case.

What is the reason why Ohm's law does not apply to semiconductor devices?

Semiconductors are nonlinear devices, thus Ohm's law doesn't apply. As a result, when the voltage changes,
the current-to-voltage ratio changes as well.

How does Ohm's law fail?

Semiconductors and unilateral devices such as diodes are not explained by Ohm's law because of their unique
behavior. If the physical conditions, such as temperature or pressure, are not kept constant, Ohm's law may
not yield the expected results.

Beginners guide to Ohm’s Law

Voltage, current, and resistance measurements across a particular conductor are made easier with the help of our
handy Ohm's law calculator. The voltage formula and Ohm's law formula are used mostly in electrical engineering
and electronic devices. When learning about electronic circuits, knowing how to compute power can come in handy.
Our Ohm Calculator can perform all of these calculations for you.

What is Ohm's Law?

One of the most fundamental and essential electric and electronic circuitry rules is Ohm's Law.

Current flow in a circuit is inversely proportional to the resistance of the circuit and is directly
proportional to the potential difference in the circuit, as stated by Ohm's Law. The letter is used to signify
the symbol for Ohm's Law.

The Ohm's Law Equation

One of the fundamentals of physics is Ohm's Law. You'll learn about the connections between voltage, amperage,
and resistance in this lesson. Voltage is defined as the difference in potential between two electrically
connected sites. Electrical charge carriers, such as electrons or electron-deficient atoms, are the primary
source of amperage. An electric current can run through a substance, but it will be resisted by it.

According to Ohm's law, a conductor's flow of electricity is directly proportional to the voltage between the
conductor's two points of connection. To put it another way, voltage and current have a fixed relationship:
I/V = const

The voltage and current quotients can be used to compute the resistance using Ohm's law. Writing it this way:
R = V/I
R - resistance
V – Voltage
V – Voltage

Ohms are the unit of resistance. The physicist Georg Ohm was the creator of Ohm's law both the unit and rule had
been named after him.

Only materials capable of generating power, including metals and ceramics, may use Ohm's law. Other materials,
such as semiconductors and insulators, cannot be measured using Ohm's law. The validity of Ohm's law is also
limited to specific conditions, such as a constant temperature.

What Is the Process of Ohms Law?

Ohm's law describes how current moves through a resistance when a specific electric potential (voltage) is
applied at each end. Flowing water can be likened to this situation. The voltage represents the water pressure,
the current represents the flow of water through the pipe, and the resistance represents the pipe size. There is
a direct correlation between the amount of pressure (voltage) being applied to the pipe and the amount of
current it is able to carry (lower the resistance).

Formula For Calculating Voltage

Ohm's law has three associated mathematical equations, one of which is the voltage formula. You can use this
formula to determine voltage based on current and resistance, which means that the voltage formula is the sum of

current and resistance. The formula is as follows:
V = IR
It is expressed as a voltage value.

The Triangle Formed By Ohm's Rule

A triangular shape can be used to depict voltage, current, and resistance formulas in order to keep them in
mind. The Ohm's Law triangle is another name for this.
Use the remaining values to solve the problem, excluding the unknown quantity.

What's The Formula For Calculating Power?

The power of a circuit can also be calculated using Ohm's law. Voltage and current are the product of each other,
hence the equation is:

P = V x I
You can use this formula to figure out the power of a light bulb, for example. This equation, which assumes that
the battery voltage is 18 volts and the current is 6 amperes, gives you an answer of 108 watts:
P = 18V x 6A = 108 watts

How Do You Compute Power?

If you're still unsure how to compute power using the above formulas or simply want to save time, you can use our
Ohm's Law calculator. In order to use this tool, you only need to input two of the four possible values. Based
on Ohm's law, Calculators are based on a powerful formula and the Ohm's Law equation. To find out how much power
you have, all you have to do is type:

In this case, the Ohm's Law Calculator will offer you two values: resistance, given in ohms, and power, in watts.

How Do You Figure Out The Voltage?

Do you have any questions about the term voltage? Current and resistance combine to form voltage.

When resistance and current are present, the voltage (potential difference) can be calculated algebraically
using Ohm's Law.


A wire with a current of 2 amperes and a resistance of 200 ohms is shown. Is it possible to calculate the voltage
using these two numbers?


Step 1: Identifying the values is the first step.
R = 200 ohm
I = 2 Amp
Step 2: Make a note of Ohm's law formula.
V = IR
Step 3: Replace variables in the equation and get the solution.
V = 2 × 200 = 400
V = 400 volts
What is the formula for determining the resistance of a material?


Assume a circuit has a current of 3.5 amps and a voltage of 32 volts. How much resistance can you expect to
encounter if you apply the formulas provided?


First, we'll identify the values.
V = 32 volts
I = 3.5 Amp
Step 2: Make a note of Ohm's law formula.
V = IR
Step 3: Substitute the resistance formula's values.
In this equation,
V = IR
R = V/I


The circuit has a 20-ohm resistance, and there is a 40-volt potential differential.

The first step is to write down the values.
The first step is to write down the values.
V = 40 volts and R = 20 ohms.
In the next step, you'll need to write down Ohm's law equation.
V = IR
To complete the equation, enter the values.
V = IR, and I = V/R = 40/20
“I” is equal to two amps.

Ohms Law Formulas Wheel

Watts of power (P) is added to Ohm's formula wheel. A unit of power is defined as the amount of energy
transmitted by a circuit in a certain amount of time. In total, there are four units. The Ohms law formula wheel
is used in conjunction with the PIE chart.

Op-amp formula wheels look complicated, but they are just as easy to work with as the PIE chart.

If two variables aren't directly proportional, a formula in each chart quadrant will reflect that. You'll find
three formulas in each quadrant.

How to Apply Ohm's Law to a Power Wheel

The Ohm's law wheel has four steps that must be followed.

If you're solving for one of the following variables, you'll need to choose which unit you're using to measure the value of the variable (E or V).
Find out which of the following variables—power (P), amps (I), resistance (R), and volts (V)—you already have some experience with (E or V).
Your two values can be entered into a formula that you've located.

Find A Solution To The Situation

Always use the proper units when solving the equation. Using ohms and amps together is perfectly acceptable. You
should, however, convert your kilohms to ohms before calculating your answer. If you don't, you'll get a much
worse result than you expected. A kilowatt or milliampere is equivalent to a watt or an ampere.


The voltage (or potential) across an electrical element and the current flowing through it can be used to measure
the amount of power it consumes. These energies are typically transformed into heat. P=I2RP=I2R or P=V2RP=V2R
can also be used to determine power according to Ohm's Law. When it comes to electricity, higher voltages result
in less power loss as a result of heat generation.

Another frequent kitchen device is the toaster, which can be used for this purpose. Bread is heated in a toaster
by sending an electrical current through a nickel-chrome wire that has a high resistance. Material with a high
resistance heats up faster than material with a low resistivity. As with incandescent lights, electrical power
is converted into heat that makes the filament glow.

Limitations of Ohm's law

Ohm's law has the following drawbacks: