Volts Amps Ohms Watts Calculator

Ohm's Law and Power Formulas:

\[ V = I \times R \] \[ P = V \times I \] \[ P = I^2 \times R \] \[ P = \frac{V^2}{R} \]

Voltage (V):

volts (V)

Current (I):

amps (A)

Resistance (R):

ohms (Ω)

Power (P):

watts (W)

Calculated Voltage (V):

Calculated Current (I):

Calculated Resistance (R):

Calculated Power (P):

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1. Ohm's Law and Power Formulas

The fundamental relationships between voltage (V), current (I), resistance (R), and power (P) in electrical circuits are described by these equations:

\[ V = I \times R \] \[ P = V \times I \] \[ P = I^2 \times R \] \[ P = \frac{V^2}{R} \]

2. How the Calculator Works

The calculator uses Ohm's Law and power formulas to compute missing values when any two of the four parameters are provided.

Key relationships:

Voltage (V) = Current (I) × Resistance (R)
Power (P) = Voltage (V) × Current (I)
Power (P) = Current² (I²) × Resistance (R)
Power (P) = Voltage² (V²) ÷ Resistance (R)

3. Practical Applications

Details: These calculations are essential for designing electrical circuits, selecting appropriate components, and ensuring safe operation of electrical devices.

4. Using the Calculator

Tips: Enter any two known values and the calculator will compute the remaining two. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is Ohm's Law?
A: Ohm's Law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

Q2: How are power calculations used?
A: Power calculations help determine energy consumption, heat dissipation, and component sizing in electrical systems.

Q3: What units are used in these calculations?
A: Standard units are volts (V) for voltage, amps (A) for current, ohms (Ω) for resistance, and watts (W) for power.

Q4: Can I calculate power without knowing current?
A: Yes, if you know voltage and resistance, you can calculate power using P = V²/R.

Q5: What if I get zero or infinite values?
A: This typically indicates an open circuit (infinite resistance) or short circuit (zero resistance) scenario.