**Update:** This page’s content is moving to a new address in the upcoming months.

The **Ohm’s law equation**, V = I × R, mathematically expresses the relationship between voltage (V), current (I), and resistance (R). This equation demonstrates that the voltage across a conductor is directly proportional to the product of the current flowing through it and the resistance it possesses.

## Practice problems

### Problem #1

Calculate the current flowing through an electronic device with a resistance of 4 Ω and a voltage of 8 V.

**Solution**

Given data:

- Current, I = ?
- Resistance, R = 4 Ω
- Voltage, V = 8 V

Applying the formula:

- V = I × R
- 8 = I × 4
- I = 2 A

Therefore, the current flowing through an electronic device is **2 A**.

### Problem #2

A 5 A current is flowing through a 15 Ω resistor. Determine the voltage across the resistor.

**Solution**

Given data:

- Current, I = 5 A
- Resistance, R = 15 Ω
- Voltage, V = ?

Applying the formula:

- V = I × R
- V = 5 × 15
- V = 75 V

Therefore, the voltage across a resistor is **75 V**.

### Problem #3

An electric circuit has a voltage of 5 V and a current of 10 A. Calculate the resistance of an electric circuit.

**Solution**

Given data:

- Voltage, V = 5 V
- Current, I = 10 A
- Resistance, R = ?

Applying the formula:

- V = I × R
- 5 = 10 × R
- R = 0.5 Ω

Therefore, the resistance of an electric circuit is **0.5 Ω**.

### Problem #4

What is the electric current flowing through a 12 Ω resistor with a voltage of 60 V?

**Solution**

Given data:

- Current, I = ?
- Resistance, R = 12 Ω
- Voltage, V = 60 V

Applying the formula:

- V = I × R
- 60 = I × 12
- I = 5 A

Therefore, the electric current flowing through a resistor is **5 A**.

## Related

- Newton’s second law equation
- Newton’s law of universal gravitation formula
- Newton’s law of cooling equation
- Coulomb’s law equation
- Snell’s law equation
**Ohm’s law equation**- Hooke’s law equation

## External links

- https://www.fluke.com/en-us/learn/blog/electrical/what-is-ohms-law
- https://study.com/learn/lesson/ohms-law-formula-circuit-calculation.html
- https://www.studysmarter.us/explanations/physics/electricity/ohms-law/

Deep

Learnool.com was founded by Deep Rana, who is a mechanical engineer by profession and a blogger by passion. He has a good conceptual knowledge on different educational topics and he provides the same on this website. He loves to learn something new everyday and believes that the best utilization of free time is developing a new skill.