# Electric Power Formula

Electric Power Formula

Electric power can be described as the rate of doing work. The Power of SI unit is watt is denoted as . Power formula connects the time, voltage and charge. Individuals can alter the formula using Ohm’s law. The formula for power is articulated as,

$P=\frac{QV}{t}=VI$

The power formula’s  alternate arrangement by making use of Ohm’s law is

$P=I^{2}R=\frac{V^{2}}{R}$

Where
the electric charge is Q
the voltage is V
the time is t
the resistance is R

Electric Power Solved Examples

Let us check out the numerical of electric power in detail in this segment.

Problem 1: If the current and voltage of an electric circuit is given as 2.5A and 10V respectively. Calculate the electrical power?

Given measures are,
I = 2.5A and V = 10V
The formula for electric power is,
P = VI
P = 10 × 2.5 = 25watts

Problem 2: Calculate the power of an electrical circuit consisting of resistance 3Ω and a current 4A flowing through this circuit?

Given parameters are,
I = 4A and R = 3Ω
Electric power formula is,
P = I2R

P = 42×3
P = 16×3 = 48 watts

The Energy consumption is given by,

$E_{(kwh/day)}=\frac{P_{w}\times&space;t_{h/day}}{1000(W/kW)}$

$E_{(kwh/day)}=\frac{500\times&space;2\times&space;60\times&space;60}{1000}$

$E_{(kwh/day)}=3600\;J$

Therefore, the energy consumption is 3600J