# Practice Test: Question Set - 01

**1. If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth**

- (A) Disappears

- (B) Becomes
sharper

- (C) Increases

- (D) Decreases

**2. To tune a parallel resonant circuit to a higher frequency, the capacitance should be**

- (A) Increased

- (B) Decreased

- (C) Left
alone

- (D) Replaced
with inductance

**3. A 15 Ω resistor, an inductor with 8 Ω inductive reactance, and a capacitor with 12 Ω capacitive reactance are in parallel across an ac voltage source. The circuit impedance is**

- (A) 12.7 Ω

- (B) 127 Ω

- (C) 4,436 Ω

- (D) 6,174 Ω

**4. In a parallel**

*RLC*circuit, the smaller reactance determines the net reactance of the circuit.- (A) True

- (B) False

**5. If the value of**

*C*in a series*RLC*circuit is decreased, the resonant frequency- (A) Is
not affected

- (B) Increases

- (C) Is
reduced to zero

- (D) Decreases

**6. A 12 Ω resistor, a 40 μF capacitor, and an 8 mH coil are in series across an ac source. The resonant frequency is**

- (A) 28.1 Hz

- (B) 281 Hz

- (C) 2,810 Hz

- (D) 10 kHz

**7. A series resonant circuit is commonly called a tank circuit.**

- (A) True

- (B) False

**8. In a series**

*RLC*circuit that is operating above the resonant frequency, the current- (A) Lags the
applied voltage

- (B) Leads
the applied voltage

- (C) Is in phase
with the applied voltage

- (D) Is
zero

**9. The impedance at the resonant frequency of a series**

*RLC*circuit with*L*= 20 mH,*C*= 0.02 μF, and*R*= 90 Ω is_{W}- (A) 0 Ω

- (B) 90 Ω

- (C) 20 Ω

- (D) 40 Ω

**10. A 24 Ω resistor, an inductor with a reactance of 120 Ω, and a capacitor with a reactance of 120 Ω are in series across a 60 V source. The circuit is at resonance. The voltage across the inductor is**

- (A) 60
V

- (B) 660
V

- (C) 30
V

- (D) 300 V

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