Equations where the known quantities are expressed as letters are called literal equations. Formulas are literal equations. Generally, the last letter of the alphabet are used to represent the unknown quantities, and the first letters, the known quantities.
Examples:
Solve for the unknown and check
1. 3x + 2a = 2x+5a transposing
3x - 2x = 5a - 2a ...
Sunday, February 27, 2011
Friday, December 10, 2010
Power Factor for a more efficient circuit and loading
Power factor is an important aspect to consider in AC circuit, because any factor less than 1 means that the circuit wiring has to carry more current than what would be necessary with zero reactance in the circuit to deliver the same true power to the resistive load.
When expressed as fraction, the ratio between true power and apparent power is called the power factor of the...
RLC parallel circuit formula and Phasor diagram
RLC in parallel
RCL parallel circuit can be considered as two reactance's XC and XL where the currents are in phase opposition in parallel with the resistor.
Through the use of the phasor diagram the effective total resistance can be found . It can be observed that IR is at the base...
Parallel RC circuit formula and phasor diagram
RC circuit in parallel formula and diagram
Currents in IR and IC are 90 degree out of phase and cannot be added directly. The total current or resultant will depend upon the resistance and R and the reactance ( AC reactance) of AC
Parallel RC circuit Phasor diagram :
As the reactance...
Parallel RL circuits formula and Phasor diagram explanation
Parallel RL circuit formula and diagram
The current through L will lag IR by 90 degrees . The resultant negative phase angle depends upon the relative values of R and XL. for R, E and R in phase . For XL , E and IL in quadratic lagging current.
As the...
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