Q. In an RLC series circuit, what is the effect of increasing the resistance on the bandwidth?
-
A.
Bandwidth increases
-
B.
Bandwidth decreases
-
C.
Bandwidth remains the same
-
D.
Bandwidth becomes zero
Solution
Increasing the resistance in an RLC series circuit decreases the bandwidth due to increased damping.
Correct Answer:
B
— Bandwidth decreases
Learn More →
Q. In small-signal models, what does the term 'small-signal' refer to?
-
A.
High-frequency signals
-
B.
Low-frequency signals
-
C.
Small variations around a bias point
-
D.
Signals with low power
Solution
Small-signal refers to small variations around a bias point in a circuit.
Correct Answer:
C
— Small variations around a bias point
Learn More →
Q. What happens to the impedance of a parallel RLC circuit at resonance?
-
A.
It becomes infinite
-
B.
It becomes zero
-
C.
It is at its minimum value
-
D.
It is at its maximum value
Solution
At resonance, the impedance of a parallel RLC circuit becomes infinite due to the cancellation of reactive components.
Correct Answer:
A
— It becomes infinite
Learn More →
Q. What happens to the impedance of a series RLC circuit at resonance?
-
A.
It becomes zero
-
B.
It becomes infinite
-
C.
It is at its minimum value
-
D.
It is at its maximum value
Solution
At resonance, the impedance of a series RLC circuit is at its minimum value.
Correct Answer:
C
— It is at its minimum value
Learn More →
Q. What is resonance in RLC circuits?
-
A.
The point where impedance is minimized
-
B.
The point where current is maximized
-
C.
The point where voltage is minimized
-
D.
The point where energy is stored
Solution
Resonance in RLC circuits occurs when the current is maximized at a specific frequency.
Correct Answer:
B
— The point where current is maximized
Learn More →
Q. What is the purpose of an operational amplifier in a circuit?
-
A.
To act as a voltage follower
-
B.
To amplify voltage differences
-
C.
To filter signals
-
D.
All of the above
Solution
Operational amplifiers can perform various functions including amplification, filtering, and buffering.
Correct Answer:
D
— All of the above
Learn More →
Q. What is the resonance frequency in an RLC circuit?
-
A.
The frequency at which impedance is minimized
-
B.
The frequency at which current is maximized
-
C.
The frequency at which energy is stored
-
D.
The frequency at which voltage is minimized
Solution
The resonance frequency is the frequency at which the impedance of the circuit is minimized, allowing maximum current flow.
Correct Answer:
A
— The frequency at which impedance is minimized
Learn More →
Q. What is the role of the inductor in an RLC circuit at resonance?
-
A.
To store energy in the electric field
-
B.
To store energy in the magnetic field
-
C.
To dissipate energy as heat
-
D.
To block AC signals
Solution
At resonance, the inductor stores energy in the magnetic field.
Correct Answer:
B
— To store energy in the magnetic field
Learn More →
Showing 1 to 8 of 8 (1 Pages)
