Power in DC Circuits (Mod.2 Sect.2 part3)

Question	Answer
_____ is the work performed in an electrical circuit.	Power
The amount of work performed by a circuit (power) is measured in units called _____.	Watts
The abbreviation for Watt is __.	W
_____ is the amount of power delivered over a period of time.	Energy
Energy is measured in units called _______ or _______.	watthours, kilowatthours
The formula for calculating power is _____.	P = E x I
The P in the power formula stands for _____ (measured in watts.)	power
The E in the power formula stands for _____ (measured in volts).	voltage
The I in the power formula stands for _____ (measured in amperes).	current
The two variations for the power formula are ____ and ____.	P = I (squared) x R, P = E (squ) / R
In any resistive circuit, the total power supplied by the power source is equal to the power dissipated through the circuit resistors. The simple phrase to help memorize this is ________________.	Power in equals power out.

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