Q. In a small-signal model, how is the output voltage related to the input voltage in an RL circuit?
-
A.
Output voltage is always greater than input voltage
-
B.
Output voltage is always less than input voltage
-
C.
Output voltage can be greater or less depending on the circuit configuration
-
D.
Output voltage is independent of input voltage
Solution
In a small-signal model, the output voltage can vary based on the circuit configuration and the values of R and L.
Correct Answer:
C
— Output voltage can be greater or less depending on the circuit configuration
Learn More →
Q. In small-signal models, what does the term 'RL circuit' refer to?
-
A.
A circuit with resistors and capacitors
-
B.
A circuit with resistors and inductors
-
C.
A circuit with diodes and transistors
-
D.
A circuit with only resistors
Solution
An RL circuit consists of resistors (R) and inductors (L), which are analyzed in small-signal models for their response to small input signals.
Correct Answer:
B
— A circuit with resistors and inductors
Learn More →
Q. What happens to the current in an RL circuit when the switch is closed?
-
A.
It instantly reaches maximum value
-
B.
It gradually increases
-
C.
It decreases to zero
-
D.
It remains constant
Solution
In an RL circuit, when the switch is closed, the current gradually increases due to the inductor's opposition to changes in current.
Correct Answer:
B
— It gradually increases
Learn More →
Q. What happens to the impedance of an RL circuit at high frequencies?
-
A.
It decreases
-
B.
It increases
-
C.
It remains constant
-
D.
It becomes zero
Solution
At high frequencies, the impedance of an RL circuit increases due to the inductive reactance, which is proportional to frequency.
Correct Answer:
B
— It increases
Learn More →
Q. What is the effect of increasing the resistance in an RL circuit?
-
A.
Increases the current
-
B.
Decreases the current
-
C.
Has no effect on current
-
D.
Increases the voltage
Solution
Increasing the resistance in an RL circuit decreases the current according to Ohm's law.
Correct Answer:
B
— Decreases the current
Learn More →
Q. What is the primary role of an inductor in an RL circuit?
-
A.
To resist changes in current
-
B.
To store electrical energy in a magnetic field
-
C.
To convert AC to DC
-
D.
To amplify voltage
Solution
An inductor in an RL circuit resists changes in current, storing energy in a magnetic field when current flows through it.
Correct Answer:
B
— To store electrical energy in a magnetic field
Learn More →
Q. What is the purpose of a rectifier in an electronic circuit?
-
A.
To amplify signals
-
B.
To convert AC to DC
-
C.
To filter noise
-
D.
To store energy
Solution
A rectifier converts alternating current (AC) to direct current (DC) for use in electronic devices.
Correct Answer:
B
— To convert AC to DC
Learn More →
Showing 1 to 7 of 7 (1 Pages)
