Question 1

Does resistance affect the resonant frequency of a series RLC circuit?

Accepted Answer

No. f₀ = 1/(2π√LC) depends only on L and C. Resistance controls only the Q-factor and bandwidth.

Question 2

What is voltage magnification in series resonance?

Accepted Answer

At resonance the capacitor and inductor voltages each equal Q times the supply voltage, which can reach dangerous levels from ordinary supplies.

Question 3

How are the half-power frequencies related to resonant frequency?

Accepted Answer

f₀ is the geometric mean: f₀ = √(f₁f₂). Bandwidth = f₂ − f₁ = f₀/Q.

Question 4

When can a parallel tank circuit fail to resonate?

Accepted Answer

When the coil resistance R ≥ √(L/C), the resonant frequency formula gives an imaginary value and resonance is impossible.

TGPSC AEE Electrical Ch 1.4: Sinusoidal Steady-State & Resonance – Complete Interactive Notes with Quiz, Timer Drill & Progress Tracker