Fourth Period Math Applications Flashcards
Describe Kirchoffs Voltage Law:
The total voltage rise or applied voltage equals the total voltage drops in a circuit.
What value is equal in each branch of a Parallel circuit?
Voltage
Describe Ohm’s Law:
Voltage is directly proportional to Current and inversely proportional to Resistance
What is the formula for solving total resistance in a Parallel circuit?
Rt = (R1^-1 + R2^-1 + R3^-1) -1
A series-parallel circuit has one path for current to flow. T or F?
False.
Name the sides of a right angle triangle:
Hypotenuse, the adjacent side and the opposite side
The combined effect of resistance, inductive reactance and capacitive reactance in a circuit is called?
Impedance - A.C circuit
Inductive reactance causes current to ______ voltage
Lag , E.L.I
Describe Capacitance:
The property of a circuit that allows it to store energy in the electrostatic field and release it back to the circuit. Because a capacitor is a DEVICE that stores and releases energy, it has a tendency to oppose any change in VOLTAGE.
Describe the phase angle:
The number of degrees by which the current through a component leads or lags the voltage across the component.
State another name for True Power or Power (P) in a circuit:
Real or active power.
State a formula for the power factor other than
P/S:
R/Z or W/VA
In Parallel,what is the PF of a pure Inductor? Lead or Lag?
0 with a 90 deg Lag
What is the PF of a Resistor? Lead or Lag?
1 In Phase
What does PF represent in a 3 phase Wye/Delta System?
The angle between the Phase Current and Phase Voltage.
Do not use which type of Triangles in which situation?
Impedance Traingles in parallel branches to get Z total of the circuit
Which formula is best for finding Q in either Series or Parallel RLC circuits?
What does Theta mean when we say “cos ø” (Cos Theta)?
Theta is just a way of saying…
“the angle we are dealing with for this calculation”
Which is the superior formula for finding True Power? (P)
P = I2R
In a resistive circuit Current is In Phase with Voltage.
True or False?
True
In an inductive circuit Current lags voltage. True or False?
True.
In a capacitive circuit current leads voltage. True or False?
True.