Work Energy Power And Efficiency And Edison 3 Wire Flashcards
When an influence attempts to change the relative motion of an object
Force
The WEIGHT varies depending on gravity
Yes
What is work?
The application of force to change the notion of an object
What is Mass?
Amount of substance contained
What is Energy
Capacity to do work
What is power?
Rate of doing work
What is equivalent to one watt
One Joule per second
Power formula:
Power= Work/ time
Power=voltage • Current
What is the multiplier for Force?
9.81 Newtons
Does Line drop relate to Watts or Volts?
Volts
Efficiency formula:
%=(output/input) •100
How many watts per one horsepower?
746W
When two unequal loads are connected to the two low voltage circuits of a three wire system the current in the neutral will be:
The difference between the load currents
What are the three benefits of a Edison 3 wire?
- Two different voltages
- Less conductor material
- Less line loss
Kirchoff’s voltage law states that the sum of all voltage drops in a closed electric circuit must equal the sum of all the voltage rises in that circuit?
True
In an unbalanced Edison-3 wire circuit what happens when the neutral breaks?
becomes a series circuit and thus, Higher resistance loads increase in voltage
What does the neutral in an Edison 3 wire balance?
The unequal load
Balancing an Edison three wire circuit is accomplished by adjusting the voltages so that they are equal. True or false?
False it is done by balancing the current
Power Loss Formula
Power= I^2 x R
When looking at the current, going clockwise to calculate the load voltage in an Edison-3 wire if it goes WITH the current are you adding or subtracting the value?
subtracting (Volt Drop)
When looking at the current, going clockwise to calculate the load voltage in an Edison-3 wire if it goes AGAINST the current are you adding or subtracting the value?
Adding (Volt Rise)
