Watt’s Law Calculator:
Enter the values of voltage, V(V) and current, I(A) to determine the value of Power, P(W).
Watt’s Law Formula:
Watt’s Law is a fundamental electrical principle that relates power, voltage, and current in an electrical circuit. It states that the power (P) dissipated in a circuit is the product of the voltage (V) across the circuit and the current (I) flowing through it. This law is named after James Watt, the inventor after whom the unit of power, the watt (W), is named.
Watt’s Law is crucial in understanding the relationship between electrical quantities, as it helps in the calculation of power in both AC (alternating current) and DC (direct current) circuits. The law is particularly useful for designing electrical circuits, selecting appropriate components, and ensuring safety by preventing excessive power dissipation that could lead to overheating or damage.
The formula is applicable for both resistive and reactive loads, where voltage and current may not always be in phase. Watt’s Law also plays an essential role in power distribution and energy consumption calculations.
Power, P(W) in watts is equal to the voltage, V(V) in volts multiplied by the current, I(A) in amperes.
Power, P(W) = V(V) * I(A)
P(W) = power in watts, W.
V(V) = voltage in volts, V.
I(A) = current in amperes, A.
Watt’s Law Calculation:
- Given: V(V) = 12V, I(A) = 5A.
Power, P(W) = V(V) * I(A)
P(W) = 12 * 5
P(W) = 60W.
- Given: P(W) = 100W, I(A) = 4A.
Power, P(W) = V(V) * I(A)
V(V) = P(W) / I(A)
V(V) = 100 / 4
V(V) = 25V.