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Ohm’s Law Calculator: Find Voltage, Current & Resistance

Ohm’s Law Calculator: Find Voltage, Current & Resistance

Q: 2. What is the formula for Ohm's Law?

The basic formula for Ohm's Law is V = I × R, where V represents voltage (measured in volts), I represents current (measured in amperes), and R represents resistance (measured in ohms). This can be rearranged to solve for any of the three variables: I = V / R and R = V / I.

Q: 3. How do I use Ohm's Law to calculate voltage?

To calculate voltage (V), use the formula V = I × R. Simply multiply the current (I) in amperes by the resistance (R) in ohms. The result will be the voltage in volts.

Q: 4. How do I use Ohm's Law to calculate current?

To calculate current (I), use the formula I = V / R. Divide the voltage (V) in volts by the resistance (R) in ohms. The result will be the current in amperes.

Q: 5. How do I use Ohm's Law to calculate resistance?

To calculate resistance (R), use the formula R = V / I. Divide the voltage (V) in volts by the current (I) in amperes. The result will be the resistance in ohms.

How to Use the Ohm’s Law Calculator with Step-by-Step Solutions

What is Ohm’s Law Calculator?

The Ohm’s Law Calculator is a simple online tool for students and enthusiasts to solve for voltage, current, or resistance in an electric circuit. Enter any two known values, and the calculator instantly provides the third, helping simplify homework and lab assignments.

With just a few clicks, learners can check answers, verify calculations, and deepen their understanding of electric circuits. This interactive tool eliminates manual formula rearrangement—making electronics and physics practical and accessible.

Formula Behind Ohm’s Law Calculator

Ohm’s Law states that voltage (V) across a conductor equals the product of current (I) flowing through it and its resistance (R). The calculator uses V = I × R, I = V ÷ R, or R = V ÷ I, solving instantly based on which two values are given.

Ohm’s Law Conversion Table

Given	Calculated
I = 2 A, R = 5 Ω	V = 10 V
V = 12 V, R = 4 Ω	I = 3 A
V = 9 V, I = 3 A	R = 3 Ω
I = 1.5 A, R = 8 Ω	V = 12 V
V = 5 V, R = 10 Ω	I = 0.5 A

Steps to Use Ohm’s Law Calculator

Enter any two values: Voltage, Current, or Resistance.
Click "Calculate" to compute the missing value.
View the result and clear calculation steps instantly.

Why Use Vedantu’s Ohm’s Law Calculator?

The Ohm’s Law Calculator saves time, reduces errors, and offers step-by-step solutions for every calculation. It’s mobile-optimized for quick checks in class or on-the-go, making it ideal for students and educators.

No need to rearrange formulas manually—simply input your known values, and get instant, accurate results. For more science and maths help, try the HCF Calculator or review Factors of Numbers for maths support.

Applications of Ohm’s Law Calculator

This tool is essential in physics labs for verifying experimental results, in engineering for quick prototyping, and even in everyday life—like troubleshooting home wiring or electronics repairs.

Students frequently use Ohm’s Law for circuits involving batteries, bulbs, or resistors. Don’t forget to explore related concepts using our Physics Pressure Calculator and brush up on Algebra Topics to keep building your science fundamentals!

FAQs on Ohm’s Law Calculator: Find Voltage, Current & Resistance

1. What is Ohm's Law?

Ohm's Law describes the relationship between voltage, current, and resistance in an electrical circuit. It states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. This relationship is fundamental to understanding and analyzing electrical circuits.

2. What is the formula for Ohm's Law?

The basic formula for Ohm's Law is V = I × R, where V represents voltage (measured in volts), I represents current (measured in amperes), and R represents resistance (measured in ohms). This can be rearranged to solve for any of the three variables: I = V / R and R = V / I.

3. How do I use Ohm's Law to calculate voltage?

To calculate voltage (V), use the formula V = I × R. Simply multiply the current (I) in amperes by the resistance (R) in ohms. The result will be the voltage in volts.

4. How do I use Ohm's Law to calculate current?

To calculate current (I), use the formula I = V / R. Divide the voltage (V) in volts by the resistance (R) in ohms. The result will be the current in amperes.

5. How do I use Ohm's Law to calculate resistance?

To calculate resistance (R), use the formula R = V / I. Divide the voltage (V) in volts by the current (I) in amperes. The result will be the resistance in ohms.

6. What are the units used in Ohm's Law?

Ohm's Law uses the following units: Voltage (V) is measured in volts, Current (I) is measured in amperes, and Resistance (R) is measured in ohms.

7. What are some real-world applications of Ohm's Law?

Ohm's Law is crucial in many areas. It's used to design and analyze electrical circuits in homes, cars, computers, and countless other devices. It's also essential for understanding how electrical components like resistors, light bulbs, and motors behave. It helps determine appropriate wire sizes and circuit breaker ratings for safety.

8. How can I use Vedantu's Ohm's Law Calculator?

Vedantu's Ohm's Law Calculator is designed for ease of use. Simply input two known values (voltage, current, or resistance), and the calculator will automatically compute the third. The tool provides clear step-by-step explanations and examples to help you understand the calculations.

9. What if I only know one value in Ohm's Law?

You need at least two values (voltage, current, or resistance) to use Ohm's Law and solve for the unknown variable. If you only have one value, you cannot apply Ohm's Law directly. More information is required to complete the calculation.

10. What happens if I enter incorrect units into the Ohm's Law calculator?

Ensure you use the correct units (volts for voltage, amperes for current, and ohms for resistance) when using the Ohm's Law calculator. Entering incorrect units will lead to inaccurate results. The calculator may provide an error message or an obviously incorrect answer if the units are mismatched.

11. How accurate is Vedantu's Ohm's Law Calculator?

Vedantu's Ohm's Law Calculator is designed for accuracy. However, remember that any calculator's precision is limited by the accuracy of the input values. If you enter approximate values, the resulting calculation will also be approximate.