# Ohm's Law Calculator

The Ohm’s Law Calculator is a useful tool for determining the voltage, current, and power relationship. Simply type in the two parameters, and the unknown parameter will appear in a flash.

### What is Meant by Ohm’s Law?

According to Ohm's law, the potential difference between two points in a circuit is directly proportional to the current running through the circuit and the resistance of the circuit.

### Ohms Law Formula

The formula that defines Ohm's law is; V = IR

- Where, V = difference in voltage or potential.
- I = current
- R = conductor's resistance

The electrical circuit's current, voltage, and resistance are calculated using Ohm's law. The voltage drop across electrical components is controlled using this law.

### Applications of Ohm's Law

- Ohm's law is most commonly used to determine an electric circuit's voltage, resistance, or current.
- To keep the desired voltage drop across the electronic components, Ohm's law is applied.
- Ohm's law is also utilised to divert current in DC ammeters and other DC shunts.

### Limitations of Ohm's Law

The following are some of Ohm's law's limitations

- Ohm's law does not apply to unilateral electrical elements like diodes and transistors since they only allow current to flow in one direction.
- Voltage and current will not be constant concerning time with non-linear electrical elements with factors like capacitance, resistance, and so on, making Ohm's law difficult to apply.

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### Voltage Formula

Finding Voltage is one of Ohm’s Law's most basic concepts. To get the Voltage, we can rewrite the calculation above as V= IR. If you know the current and resistance, you can easily compute the voltage by replacing them in the formula above. Volts are the units of voltage.

### How to Calculate Power?

Power is another value that can be determined using Ohm's Law as a foundation. The formula P = V x I expresses power as the product of voltage and current. Watts are the units of power.

### Ohm's Law for Anisotropic Material

Ohm’s Law can also be expressed in terms of the location of electrical properties within a conductor. If the particular resistance of conductive materials is independent of the applied field value and direction. The formula for calculating Ohm's law is

**ρ = E / J**

- Where, ρ = specific resistance of the conductive material
- E = Electric Field of the Vector
- J = Current Density Vector

When working with anisotropic materials like wood or graphite, the above formula can be quite useful.

### How to Use the Ohms Law Calculator?

The following is the procedure how to use the Ohms law calculator

- Fill in the appropriate input fields with voltage, resistance, or current.
- To acquire the result, click the "Calculate" button.
- Finally, in the new window, the resistance, voltage, and current will be presented.

### Examples on Ohm’s Law Calculations

**Question 1:** A current of 4.2 A passes through an electric iron with a resistance of 60. Calculate the difference between two places in terms of voltage?

**Solution:**

Given: I = 4.2A

R = 60

V = IR = 4.2 x 60 = 252v

**Question 2:** A fully resistive electrical equipment is connected to an EMF source of 7.0 V. (a light bulb). It is powered by a 3.0 A electric current. Assume that the conducting wires have no resistance. Determine how much resistance the electrical appliance provides?

**Solution:**

Given: V = 7.0v

I = 3.0A

V = IR

R = V/I = 7.0/3.0 = 2.33Ω

### FAQs on Ohm’s Law Calculator

**1. How many amperes does one ohm contain?**

One. We'll assume you're working with amperes and volts/ohms. The ampere is the SI base unit for electric current.

**2. What is the application of Ohm's Law?**

Ohm's law is used to validate the static values of circuit components such as current levels, voltage supplies, and voltage drops.

**3. How many ohms in 100 watts?**

8 ohms. It's worth noting that the power output (100 watts) is at a set load (8 ohms). This means that the maximum output power of an 8-ohm speaker will be 100 watts.

**4. Is there a difference between ohms and K ohms?**

One kilo ohm is equal to 1,000 ohms, which is the resistance between two points of a conductor carrying one amp at one volt.