Ohm's Law Calculator
An Ohm's Law Calculator is a valuable tool for anyone dealing with electrical circuits. Its users may be students, teachers, or any other professionals in the mechanical or electrical fields. The meaning of Ohm’s law is that the product of current and resistance is always equal to the voltage across the circuit. And this is what the Ohm’s law calculator does.
If you know two of these three values, our Ohm’s law calculator will tell you the third one. You just need to enter any two known values. This calculator helps understand and troubleshoot electrical systems, design circuits, and ensure everything works correctly. to understand and troubleshoot electrical systems, design circuits, and ensure everything works correctly.
What Do I Need to Put in the Calculator?
When you open the calculator, you will see three fields: the first is for the current, the second is for the voltage, and the third is for the resistance.
- Current: If you know the current (measured in Amperes, A) in the circuit and want to find either voltage or resistance, input the current value.
- Voltage: If you know the voltage (measured in Volts, V) across the circuit and want to find either current or resistance, input the voltage value.
- Resistance: If you know the resistance (measured in Ohms, Ω) in the circuit and want to find either voltage or current, input the resistance value.
How to Use Ohm’s Law Calculator?
When you know any of the two values from current, voltage, and resistance, you must enter them into the calculator. Here are the steps to enter the details:
- Open the Calculator: Access the Ohm's Law Calculator tool on your device.
- Enter the First Value: Input the value for one of the known fields (current, voltage, or resistance) into its respective field in the calculator.
- Enter the Second Value: Input the value for the second known field into its respective field.
Click the “Calculate” button to find the missing value (voltage, current, or resistance) based on the two values you entered. The calculator will display the calculated value for the unknown parameter, giving you the necessary information to complete your circuit analysis.
Example;
Let's say you're working on an electrical circuit and know two values: the current and the resistance. Specifically, the circuit has a current of 3 Amperes (A) and a resistance of 10 Ohms (Ω). You need to find the voltage across the circuit.
Current (I) = 3 A
Resistance (Ω) = 10 Ω
Solution
To calculate th voltage, the calculator will imply the Ohm’s law format, which is:
V = I x R
- where V is the voltage, I is the current, and R is the resistance.
Inputting the details in the formula
V =3 A x 10 Ω
V =30 V
So, the voltage across the circuit is 30 Volts (V).
This result tells you how much electrical potential difference there is between the two points in the circuit with the given current and resistance.
What is Ohm’s Law?
Ohm’s law is a fundamental principle in electronics and electrical engineering. It describes the relationship between an electrical circuit's voltage, current, and resistance. This was formulated by the German physicist George Simon Ohm in 1827. Its formula is:
V = I x R
Parameter | Formula | Unit |
Voltage (V) | V=I×R | Volts (V) |
Current (I) | I=RV | Amperes (A) |
Resistance (R) | R=IV | Ohms (Ω) |
Industries Who Use Ohm’s Law
Ohm’s law is applicable in many practical fields and industries due to its vast range of applications. It is helpful for solving multiple problems such as troubleshooting circuits, designing electrical systems, and controlling circuit behaviour. Here is a list of industries which use ohm’s law:
- Electrical Engineering
- Electronics
- Telecommunication
- Power generation and Distribution
- Automotive Industry
- Aerospace
- Energy Sector
- Industrial Automation
- Consumer Appliances
- Medical Devices
- Building Services
- Research & Development
- Military & Defence
- Education