**DC Power Calculator**

DC Power |
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Voltage |
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Resistance |
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Current |
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### Definition

**Electric power** is the rate of energy consumption in an electrical circuit i.e the electric power is equal to the energy consumption divided by the consumption time.

The electric power associated with a complete electric circuit or a circuit component represents the rate at which energy is converted from the electrical energy of the moving charges to some other form, e.g., heat, mechanical energy, etc.

For a resistor in a DC Circuit the power is given by the product of applied voltage and the electric current.

## Formula

Formula used for **Electric Power** calculation is:

Power_{(watt)}[P]= Voltage_{(v)}[V] * Current_{(Amp)}[I]

Power _{(watt)}[P]= Voltage² _{(v²)}[V²] / Resistance_{(Ω)}[R]

Power_{(watt)}[P] = Current² _{(A²)}[I²] * Resistance_{(Ω)}[R]

**Example:**

**1.** Calculate power of a resistor of resistance 2 Ωand voltage across the resistor is 6 V?

**Sol. :**

P = V² / R

P = 6²_{(V²)} / 2_{(Ω)}

P = 36 / 2

P = 18 W

**Power is 18 Watt**

**2.** The electric current flowing through a resistor is 5 A if power dissipated in the resistor is 35 Watt. Calculate voltage applied across the resistor?

**Sol. :**

P = V * I

V = P / I

V = 35_{(W)} / 5_{(A)}

V = 7 v

**Voltage applied is 7 volt**

## Units

The standard unit of measurement for Electric Power is **Watt i.e. (W)**

Below is the conversion chart of various other units of Power