Voltage Regulators - General Questions (4)

Directions to Solve

Voltage Regulators - General Questions

25.

________ regulation can be defined as the percentage change in the output voltage for a given change in load current.

A.	Line
B.	Load

Answer: Option B

Explanation:

No answer description available for this question.

26.

In an improved shunt regulator, which of the following components sets the reference voltage?

A.	Transistor Q1
B.	Zener diode
C.	Transistor Q2
D.	RS

Answer: Option B

Explanation:

No answer description available for this question.

27.

Refer to the given figure. If the load is short-circuited, what would be the maximum current through R₁?

mcq18_1006_1b (3)

A.	1 A
B.	1.2 A
C.	1.5 A
D.	5 A

Answer: Option C

Explanation:

No answer description available for this question.

28.

Calculate the dc voltage across a 2-k omega (4) load for an RC filter section (R = 50 mu (3)1 C = 20 mu (3)1 F). The dc voltage across the initial filter capacitor is V_dc = 50 V.

A.	40.78 V
B.	42.78 V
C.	45.78 V
D.	48.78 V

Answer: Option D

Explanation:

No answer description available for this question.

29.

What is the ratio of the peak ripple voltage level to its rms voltage level?

A.
B.
C.
D.

Answer: Option A

Explanation:

No answer description available for this question.

30.

In a simple series regulator circuit, which of the following components is the controlling element?

A.	Load resistor
B.	Zener diode
C.	Transistor Q1
D.	None of the above

Answer: Option C

Explanation:

No answer description available for this question.

31.

Refer to the given figure. The purpose for the zener diode D₁ is

mcq18_1006_1b (2)

A.	to supply a reference voltage.
B.	to amplify the error signal.
C.	to sense the error signal.
D.	to limit the input voltage to the circuit.

Answer: Option A

Explanation:

No answer description available for this question.

32.

In a series regulator, what is the purpose of fold-back limiting?

A.	to provide more current in the case of a short circuit
B.	to limit output voltage if input voltage goes too high
C.	to bypass the pass-transistor, if the pass-transistor should fail
D.	to provide current up to a maximum, but drop current to a lower value when the output becomes shorted, to prevent overheating of the device

Answer: Option D

Explanation:

No answer description available for this question.

Voltage Regulators - General Questions (4)

Voltage Regulators - General Questions

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