Apparent Power

Apparent POWER(in VA)

- is the product of the RMS values of voltage and current.

RMS(Root Mean Square)

- arises from the need measure the effectiveness of a voltage or current source 

in delivering power to a resistive load.

The incandescent light bulb is a commonly-used resistive load.

Consider this is a circuit.

Find the apparent power of the circuit:

• For getting the apparent power.
• The formula is S = Vrms Irms
• In the formula, the Irms is also unknown.
• Therefore, to solve the Apparent Power(S) get first the Irms.
• To get the Irms, use Ohm's Law. Don't forget that! :))
• Formula for Ohm's Law: 
• I = Vrms/Z , instead of R.

•  Then, you can now solve the Apparent Power(S)
• FINISH