Voltage Regulators - General Questions (6)

Directions to Solve

Voltage Regulators - General Questions

41.

For a full-wave rectifier with ac ripple at 120 Hz, the impedance of a capacitor can be calculated using X_C = ________.

A.	0.707 Ã· C
B.	1.414 Ã· C
C.	1.3 Ã· C
D.	0.785 Ã· C

Answer: Option C

Explanation:

No answer description available for this question.

42.

In Figure 17-1(a)(see question 6), the purpose of R₁ is to

A.	provide a reference voltage.
B.	limit current through the diode.
C.	limit voltage to the op-amp.
D.	provide output voltage sampling.

Answer: Option B

Explanation:

No answer description available for this question.

43.

Refer to the given figure. This circuit is called

mcq18_1006_1c (1)

A.	a series-pass voltage regulator.
B.	a shunt voltage regulator.
C.	a step-up switching regulator.
D.	a step-down switching regulator.

Answer: Option D

Explanation:

No answer description available for this question.

44.

A switching regulator that is configured as a voltage-inverter produces what type of output?

A.	an ac output with opposite phase to the input ac
B.	a dc output that is the negative of the dc input voltage
C.	an output that is a higher voltage than the input voltage
D.	an ac output from a dc input voltage

Answer: Option B

Explanation:

No answer description available for this question.

45.

A voltage regulator has a no-load output of 18 V and a full-load output of 17.3 V. The percent load regulation is

A.	0.25%.
B.	96.1%.
C.	4.05%.
D.	1.04%.

Answer: Option C

Explanation:

No answer description available for this question.

46.

Calculate the ripple of a filter output having a 20-V dc component and a 1.7 V_r(rms) ac component.

A.	6%
B.	8.5%
C.	85%
D.	58%

Answer: Option B

Explanation:

No answer description available for this question.

47.

If the value of full-load voltage is the same as the no-load voltage, the voltage regulation calculated is ________ %, which is the best expected.

A.	0
B.	1
C.	99
D.	100

Answer: Option A

Explanation:

No answer description available for this question.

48.

What is the ratio of the period of the output voltage to the period of the input voltage in a full-wave rectifier?

A.	0
B.	0.5
C.	1
D.	2

Answer: Option B

Explanation:

No answer description available for this question.

Voltage Regulators - General Questions (6)

Voltage Regulators - General Questions

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