Power Factor — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Power Factor Applicable to all Alternating Current (AC) circuits containing resistive and reactive elements. Draw the impedance triangle for a series LCR circuit Identify the base of the triangle as Resistance (R) Identify the hypotenuse of the triangle as Impedance (Z) Apply the trigonometric ratio for cosine as adjacent side divided by hypotenuse Z must be greater than or equal to R Z cannot be zero Power factor is always between 0 and 1 inclusive Thinking power factor can be greater than 1 Assuming purely inductive or capacitive circuits have a power factor of 1 (they are actually 0) Confusing phase angle with power factor