3.9 Power Flashcards
1
Q
Definition of power
A
The rate at which work is performed
2
Q
Equation for power
A
P = V x I
Or
P = I^2 x R
3
Q
What are the two methods of measuring electrical power?
A
Using a wattmeter (Direct method)
Or
Measuring voltage and current with a voltmeter and an ammeter (Indirect method)
4
Q
What are the two forms that energy can be stored?
A
Potential energy and kinetic energy
5
Q
Kinect energy equation
A
W = 1/2 mv²
6
Q
Potential energy equation
A
W=mxgxh
7
Q
Electrical work equation
A
W=VxQ
W is the work, V is the voltage and Q is the charge
