Quiz on Circuit Analysis: Resonance and Selectivity

What is the condition for resonance in a series RLC circuit?

• X_L = X_C

• X_L > X_C

• X_C > X_L

• Z = 0

What happens to the inductive reactance as frequency increases?

• It becomes zero

• It decreases

• It remains constant

• It increases linearly

How is capacitive reactance related to frequency?

• It is quadratic

• It is directly proportional

• It is inversely proportional

• It is independent

At resonance, the total impedance of a series RLC circuit is equal to:

• Z = X_L + X_C

• Z = X_L - X_C

• Z = R

• Z = 0

What does the Quality Factor (Q) measure in a circuit?

• The resistance only

• The total current

• The sharpness of the resonance peak

• The total voltage

What is the relationship between resonant frequency and bandwidth in a circuit?

• Q = ƒ_r + BW

• Q = ƒ_r / BW

• Q = ƒ_r - BW

• Q = BW / ƒ_r

In a parallel resonance circuit, resonance occurs when:

• V_L = V_C

• I_L = I_C

• R = 0

• X_L = X_C

What is the effect of resonance on the total current in a parallel RLC circuit?

• It becomes zero

• It increases

• It remains constant

• It decreases

What is the formula for calculating the resonant frequency (ƒ_r) in a series RLC circuit?

• ƒ_r = L / C

• ƒ_r = 1 / (2π√(LC))

• ƒ_r = R / (2πL)

• ƒ_r = 2πR

What is the phase angle of a series resonance circuit at frequencies above ƒ_r?

• Zero

• Negative

• Positive

• Undefined