64 + Mcqs in Regulated Dc Power Supply Page 1 McqOptions

1.	A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation ?
A.	09%
B.	87 %
C.	72 %
D.	None of the above
Answer» B. 87 %

Discussion

2.	A 5 mA changes in Zener current produces a 50 mA change in Zener voltage. What is the Zener impedance ?
A.	1 O
B.	1 O
C.	100 O
D.	10 O
Answer» E.

Discussion

3.	A 30 V Zener will have depletion layer width_______________ that of 10 V Zener?
A.	More than
B.	Less than
C.	Equal to
D.	None of the above
Answer» B. Less than

Discussion

4.	A Zener diode that has very narrow depletion layer will breakdown bymechanism
A.	valanche
B.	ener
C.	oth avalanche and Zener
D.	one of the above
Answer» C. oth avalanche and Zener

Discussion

5.	In an unregulated power supply, if input a.c. voltage increases, the output voltage .
A.	Increases
B.	Decreases
C.	Remains the same
D.	None of the above
Answer» B. Decreases

Discussion

6.	A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?
A.	3.09
B.	2.87
C.	5.72
D.	None of the above
Answer» B. 2.87

Discussion

7.	The Zener current will be minimum when ___________
A.	Load current is maximum
B.	Load current is minimum
C.	Load current is zero
D.	None of the above
Answer» B. Load current is minimum

Discussion

8.	The current in a Zener diode is limited by ___________
A.	External resistance
B.	Power dissipation
C.	Both (A) and (B)
D.	None of the above
Answer» D. None of the above

Discussion

9.	Another name for Zener diode is ___________ diode
A.	Breakdown
B.	Voltage
C.	Power
D.	Current
Answer» B. Voltage

Discussion

10.	A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?
A.	10 Ω
B.	20 Ω
C.	15 Ω
D.	40 Ω
Answer» E.

Discussion

11.	In a loaded Zener regulator, which is the largest Zener current?
A.	Series current
B.	Zener current
C.	Load current
D.	None of the above
Answer» B. Zener current

Discussion

12.	A Zener diode utilises ___________ characteristic for voltage regulation
A.	Forward
B.	Reverse
C.	Both forward and reverse
D.	None of the above
Answer» C. Both forward and reverse

Discussion

13.	A power supply which has voltage regulation of ___________ is unregulated power supply
A.	0%
B.	5%
C.	10%
D.	8%
Answer» D. 8%

Discussion

14.	A Zener diode is used as a ___________ voltage regulating device
A.	Shunt
B.	Series
C.	Series-shunt
D.	None of the above
Answer» B. Series

Discussion

15.	What is true about the breakdown voltage in a Zener diode?
A.	It decreases when load current increases
B.	It destroys the diode
C.	It equals current times the resistance
D.	It is approximately constant
Answer» E.

Discussion

16.	A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage?
A.	8 V
B.	7 V
C.	6 V
D.	2 V
Answer» B. 7 V

Discussion

17.	The load voltage is approximately constant when a Zener diode is ___________
A.	Forward biased
B.	Unbiased
C.	Reverse biased
D.	Operating in the breakdown region
Answer» E.

Discussion

18.	If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?
A.	10%
B.	20%
C.	15%
D.	5%
Answer» E.

Discussion

19.	When load current is zero, the Zener current will be
A.	Zero
B.	Minimum
C.	Maximum
D.	None of the above
Answer» D. None of the above

Discussion

20.	For increasing the voltage rating, zeners are connected in ___________
A.	Parallel
B.	Series-parallel
C.	Series
D.	None of the above
Answer» D. None of the above

Discussion

21.	As the junction temperature increases, the voltage breakdown point for avalanche mechanism ___________
A.	Remains the same
B.	Decrease
C.	Increases
D.	None of the above
Answer» D. None of the above

Discussion

22.	In a Zener voltage regulator, the changes in load current produce changes in ___________
A.	Zener current
B.	Zener voltage
C.	Zener voltage as well as Zener current
D.	None of the above
Answer» B. Zener voltage

Discussion

23.	A Zener diode that has very narrow depletion layer will breakdown by mechanism
A.	Avalanche
B.	Zener
C.	Both avalanche and Zener
D.	None of the above
Answer» C. Both avalanche and Zener

Discussion

24.	A Zener voltage regulator is used for ___________ load currents
A.	High
B.	Very high
C.	Moderate
D.	Small
Answer» E.

Discussion

25.	In an unregulated power supply, if load current increases, the output voltage ___________
A.	Remains the same
B.	Decreases
C.	Increases
D.	None of the above
Answer» C. Increases

Discussion

26.	Zener diode are generally made of ___________
A.	Germanium
B.	Silicon
C.	Carbon
D.	None of the above
Answer» C. Carbon

Discussion

27.	A Zener regulator ___________ in the power supply
A.	Increases the ripple
B.	Decreases the ripple
C.	Neither increases nor decreases the ripple
D.	Data insufficient
Answer» C. Neither increases nor decreases the ripple

Discussion

28.	In an unregulated power supply, if input a.c. voltage increases, the output voltage .~!
A.	Increases
B.	Decreases
C.	Remains the same
D.	None of the above
Answer» B. Decreases

Discussion

29.	A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?~!
A.	3.09
B.	2.87
C.	5.72
D.	None of the above
Answer» B. 2.87

Discussion

30.	/_When load current is zero, the Zener current will be?
A.	Zero
B.	Minimum
C.	Maximum
D.	None of the above
Answer» D. None of the above

Discussion

31.	/_A power supply which has voltage regulation of ___________ is unregulated power supply?
A.	0%
B.	5%
C.	10%
D.	8%
Answer» D. 8%

Discussion

32.	/_In a Zener voltage regulator, the changes in load current produce changes in ___________?
A.	Zener current
B.	Zener voltage
C.	Zener voltage as well as Zener current
D.	None of the above
Answer» B. Zener voltage

Discussion

33.	/_A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage??
A.	8 V
B.	7 V
C.	6 V
D.	2 V
Answer» B. 7 V

Discussion

34.	/_The Zener current will be minimum when ___________?
A.	Load current is maximum
B.	Load current is minimum
C.	Load current is zero
D.	None of the above
Answer» B. Load current is minimum

Discussion

35.	/_A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply??
A.	10 ≈í¬©
B.	20 ≈í¬©
C.	15 ≈í¬©
D.	40 ≈í¬©
Answer» E.

Discussion

36.	/_In an unregulated power supply, if load current increases, the output voltage ___________?
A.	Remains the same
B.	Decreases
C.	Increases
D.	None of the above
Answer» C. Increases

Discussion

37.	_ For increasing the voltage rating, zeners are connected in ___________$?
A.	Parallel
B.	Series-parallel
C.	Series
D.	None of the above
Answer» D. None of the above

Discussion

38.	_ A Zener diode is used as a ___________ voltage regulating device$?
A.	Shunt
B.	Series
C.	Series-shunt
D.	None of the above
Answer» B. Series

Discussion

39.	_ A Zener diode that has very narrow depletion layer will breakdown by mechanism$?
A.	Avalanche
B.	Zener
C.	Both avalanche and Zener
D.	None of the above
Answer» C. Both avalanche and Zener

Discussion

40.	_ The load voltage is approximately constant when a Zener diode is ___________$?
A.	Forward biased
B.	Unbiased
C.	Reverse biased
D.	Operating in the breakdown region
Answer» E.

Discussion

41.	_ The current in a Zener diode is limited by ___________$?
A.	External resistance
B.	Power dissipation
C.	Both (A) and (B)
D.	None of the above
Answer» D. None of the above

Discussion

42.	_ In a loaded Zener regulator, which is the largest Zener current?$?
A.	Series current
B.	Zener current
C.	Load current
D.	None of the above
Answer» B. Zener current

Discussion

43.	_ Zener diode are generally made of ___________$?
A.	Germanium
B.	Silicon
C.	Carbon
D.	None of the above
Answer» C. Carbon

Discussion

44.	_As the junction temperature increases, the voltage breakdown point for avalanche mechanism ___________$?
A.	Remains the same
B.	Decrease
C.	Increases
D.	None of the above
Answer» D. None of the above

Discussion

45.	_What is true about the breakdown voltage in a Zener diode?$?
A.	It decreases when load current increases
B.	It destroys the diode
C.	It equals current times the resistance
D.	It is approximately constant
Answer» E.

Discussion

46.	_A Zener voltage regulator is used for ___________ load currents$?
A.	High
B.	Very high
C.	Moderate
D.	Small
Answer» E.

Discussion

47.	_If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?$?
A.	10%
B.	20%
C.	15%
D.	5%
Answer» E.

Discussion

48.	_Another name for Zener diode is ___________ diode$?
A.	Breakdown
B.	Voltage
C.	Power
D.	Current
Answer» B. Voltage

Discussion

49.	_A Zener diode utilises ___________ characteristic for voltage regulation$?
A.	Forward
B.	Reverse
C.	Both forward and reverse
D.	None of the above
Answer» C. Both forward and reverse

Discussion

50.	_A Zener regulator ___________ in the power supply$?
A.	Increases the ripple
B.	Decreases the ripple
C.	Neither increases nor decreases the ripple
D.	Data insufficient
Answer» C. Neither increases nor decreases the ripple

Discussion

Explore topic-wise MCQs in Electrical Engineering.

A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation ?

A 5 mA changes in Zener current produces a 50 mA change in Zener voltage. What is the Zener impedance ?

A 30 V Zener will have depletion layer width_______________ that of 10 V Zener?

A Zener diode that has very narrow depletion layer will breakdown bymechanism

In an unregulated power supply, if input a.c. voltage increases, the output voltage .

A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?

The Zener current will be minimum when ___________

The current in a Zener diode is limited by ___________

Another name for Zener diode is ___________ diode

A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply?

In a loaded Zener regulator, which is the largest Zener current?

A Zener diode utilises ___________ characteristic for voltage regulation

A power supply which has voltage regulation of ___________ is unregulated power supply

A Zener diode is used as a ___________ voltage regulating device

What is true about the breakdown voltage in a Zener diode?

A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage?

The load voltage is approximately constant when a Zener diode is ___________

If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?

When load current is zero, the Zener current will be

For increasing the voltage rating, zeners are connected in ___________

As the junction temperature increases, the voltage breakdown point for avalanche mechanism ___________

In a Zener voltage regulator, the changes in load current produce changes in ___________

A Zener diode that has very narrow depletion layer will breakdown by mechanism

A Zener voltage regulator is used for ___________ load currents

In an unregulated power supply, if load current increases, the output voltage ___________

Zener diode are generally made of ___________

A Zener regulator ___________ in the power supply

In an unregulated power supply, if input a.c. voltage increases, the output voltage .~!

A certain regulator has a no-load voltage of 6 V and a full-load output of 5.82 V. What is the load regulation?~!

*/*_When load current is zero, the Zener current will be?

*/*_A power supply which has voltage regulation of ___________ is unregulated power supply?

*/*_In a Zener voltage regulator, the changes in load current produce changes in ___________?

*/*_A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage??

*/*_The Zener current will be minimum when ___________?

*/*_A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply??

*/*_In an unregulated power supply, if load current increases, the output voltage ___________?

_ For increasing the voltage rating, zeners are connected in ___________$?

_ A Zener diode is used as a ___________ voltage regulating device$?

_ A Zener diode that has very narrow depletion layer will breakdown by mechanism$?

_ The load voltage is approximately constant when a Zener diode is ___________$?

_ The current in a Zener diode is limited by ___________$?

_ In a loaded Zener regulator, which is the largest Zener current?$?

_ Zener diode are generally made of ___________$?

_As the junction temperature increases, the voltage breakdown point for avalanche mechanism ___________$?

_What is true about the breakdown voltage in a Zener diode?$?

_A Zener voltage regulator is used for ___________ load currents$?

_If the input a.c. voltage to regulated or ordinary power supply increases by 5% what will be the approximate change in d.c. output voltage?$?

_Another name for Zener diode is ___________ diode$?

_A Zener diode utilises ___________ characteristic for voltage regulation$?

_A Zener regulator ___________ in the power supply$?

/_When load current is zero, the Zener current will be?

/_A power supply which has voltage regulation of ___________ is unregulated power supply?

/_In a Zener voltage regulator, the changes in load current produce changes in ___________?

/_A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage??

/_The Zener current will be minimum when ___________?

/_A power supply can deliver a maximum rated current of 0.5 A at full-load output voltage of 20 V. What is the minimum load resistance that you can connect across the supply??

/_In an unregulated power supply, if load current increases, the output voltage ___________?