EE 210 Exam 3 - Complete Practice Exam Questions
and Answers | 2026 Revised Update | 100%
Correct - PSU.
SECTION A: RLC Circuit Fundamentals
1. A series RLC circuit has too much oscillation in response to a step function. To
decrease the oscillation, which of the following should be done?
A) Decrease the resistance
B) Decrease the inductance
C) Decrease the capacitance
D) Increase the resistance
Answer: D) Increase the resistance
Explanation: Increasing resistance increases damping, reducing oscillation. Lower
resistance decreases damping and increases oscillation.
2. A parallel RLC circuit has too much oscillation in response to a step function. To
decrease the oscillation, which of the following should be done?
A) Decrease the resistance
B) Decrease the inductance
C) Decrease the capacitance
D) Increase the resistance
Answer: A) Decrease the resistance
Explanation: In parallel RLC circuits, decreasing resistance increases damping.
,3. For a series RLC circuit with R = 100Ω, L = 0.1H, and C = 10μF, the damping ratio
α is:
A) 100
B) 500
C) 1000
D) 2000
Answer: B) 500
Calculation: α = R/(2L) = 100/(2×0.1) = 500
4. For the circuit in Question 3, the resonant frequency ω₀ is:
A) 1000 rad/s
B) 500 rad/s
C) 2000 rad/s
D) 100 rad/s
Answer: A) 1000 rad/s
Calculation: ω₀ = 1/√(LC) = 1/√(0.1×10×10⁻⁶) = 1000 rad/s
5. The circuit in Question 3 is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Undamped
Answer: A) Underdamped
Explanation: α = 500, ω₀ = 1000. Since α < ω₀, the system is underdamped.
,6. The characteristic equation s² + 8s + 15 = 0 represents a system that is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Unstable
Answer: C) Overdamped
Explanation: Roots are s = -3 and s = -5 (real and distinct), indicating overdamped.
7. The characteristic equation s² + 4s + 4 = 0 represents a system that is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Unstable
Answer: B) Critically damped
Explanation: Roots are s = -2 (repeated), indicating critical damping.
8. The characteristic equation s² + 4s + 12 = 0 represents a system that is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Unstable
Answer: A) Underdamped
Explanation: Roots are complex conjugates, indicating underdamped.
, 9. For a series RLC circuit, as resistance increases, the system becomes:
A) More underdamped
B) More overdamped
C) More critically damped
D) Unaffected
Answer: B) More overdamped
10. For a parallel RLC circuit, as resistance increases, the system becomes:
A) More underdamped
B) More overdamped
C) More critically damped
D) Unaffected
Answer: A) More underdamped
11. A series RLC circuit is critically damped. If the resistor value increases, the
circuit becomes:
A) Underdamped
B) Overdamped
C) Critically damped
D) Unstable
Answer: B) Overdamped
12. A series RLC circuit is critically damped. If the resistor value decreases, the
circuit becomes:
A) Underdamped
B) Overdamped
and Answers | 2026 Revised Update | 100%
Correct - PSU.
SECTION A: RLC Circuit Fundamentals
1. A series RLC circuit has too much oscillation in response to a step function. To
decrease the oscillation, which of the following should be done?
A) Decrease the resistance
B) Decrease the inductance
C) Decrease the capacitance
D) Increase the resistance
Answer: D) Increase the resistance
Explanation: Increasing resistance increases damping, reducing oscillation. Lower
resistance decreases damping and increases oscillation.
2. A parallel RLC circuit has too much oscillation in response to a step function. To
decrease the oscillation, which of the following should be done?
A) Decrease the resistance
B) Decrease the inductance
C) Decrease the capacitance
D) Increase the resistance
Answer: A) Decrease the resistance
Explanation: In parallel RLC circuits, decreasing resistance increases damping.
,3. For a series RLC circuit with R = 100Ω, L = 0.1H, and C = 10μF, the damping ratio
α is:
A) 100
B) 500
C) 1000
D) 2000
Answer: B) 500
Calculation: α = R/(2L) = 100/(2×0.1) = 500
4. For the circuit in Question 3, the resonant frequency ω₀ is:
A) 1000 rad/s
B) 500 rad/s
C) 2000 rad/s
D) 100 rad/s
Answer: A) 1000 rad/s
Calculation: ω₀ = 1/√(LC) = 1/√(0.1×10×10⁻⁶) = 1000 rad/s
5. The circuit in Question 3 is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Undamped
Answer: A) Underdamped
Explanation: α = 500, ω₀ = 1000. Since α < ω₀, the system is underdamped.
,6. The characteristic equation s² + 8s + 15 = 0 represents a system that is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Unstable
Answer: C) Overdamped
Explanation: Roots are s = -3 and s = -5 (real and distinct), indicating overdamped.
7. The characteristic equation s² + 4s + 4 = 0 represents a system that is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Unstable
Answer: B) Critically damped
Explanation: Roots are s = -2 (repeated), indicating critical damping.
8. The characteristic equation s² + 4s + 12 = 0 represents a system that is:
A) Underdamped
B) Critically damped
C) Overdamped
D) Unstable
Answer: A) Underdamped
Explanation: Roots are complex conjugates, indicating underdamped.
, 9. For a series RLC circuit, as resistance increases, the system becomes:
A) More underdamped
B) More overdamped
C) More critically damped
D) Unaffected
Answer: B) More overdamped
10. For a parallel RLC circuit, as resistance increases, the system becomes:
A) More underdamped
B) More overdamped
C) More critically damped
D) Unaffected
Answer: A) More underdamped
11. A series RLC circuit is critically damped. If the resistor value increases, the
circuit becomes:
A) Underdamped
B) Overdamped
C) Critically damped
D) Unstable
Answer: B) Overdamped
12. A series RLC circuit is critically damped. If the resistor value decreases, the
circuit becomes:
A) Underdamped
B) Overdamped
