Inductive Reactance — the NEET Physics formula with its derivation, variables, validity constraints and worked solver.
Inductive Reactance Purely inductive or LCR alternating current circuits. Start with the definition of induced emf: e = -L(di/dt). For AC current i = I0 sin(wt), calculate di/dt = w I0 cos(wt). Compare the peak voltage V0 = w L I0 with Ohm's law V = IR. Define the ratio V0/I0 as the reactance X L. Valid for sinusoidal alternating currents. Assumes an ideal inductor with zero internal resistance. Thinking Inductive Reactance depends on DC voltage; it is zero for DC (f=0). Confusing reactance with resistance regarding power dissipation; an ideal inductor dissipates zero average power despite having reactance.