Regulated DC Power Supply

This is an MCQ-based quiz on Regulated DC Power Supply.

This includes the Avalanche mechanism, and Zener mechanism

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

Increases Decreases Remains the same None of the above

A power supply which has voltage regulation of ……….. is unregulated power supply

0 % 5 % 10 % 8%

An ideal regulated power supply is one which has voltage regulation of …………

0% 5% 10% 1%

A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes ___________

Less than load current Zero More than load current None of the above

A Zener regulator ___________ in the power supply

Increases the ripple Decreases the ripple Neither increases nor decreases the ripple Data insufficient

Zener diode are generally made of ___________

Germanium Silicon Carbon None of the above

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

Remains the same Decreases Increases None of the above

Commercial power supplies have voltage regulation ………….

Of 10%

Of 15%

Of 25%

Within 1%

When load current is zero, the Zener current will be ____.

Zero Maximum Minimum None of the above

Which one of the following is the another name of Zener diode?

Voltage Breakdown Power Current

The basic building blocks of a regulated DC power supply contains:

A step-down transformer A rectifier and A DC filter A regulator All of the above

Zener diode are generally made of _____.

Germanium Silicon Carbon None of the above

A regulated DC power supply is also known as a ____.

Linear power supply

Dual power supply

Hyper power supply

None of the above

A Zener diode __________

Is a battery Acts like a battery in the breakdown region Has a barrier potential of 1 V Is forward biased

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

8 V 7 V 6 V 2 V

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

1 O

.1 O

100 O

10 O

If the load resistance decreases in a Zener regulator, then Zener current ___________

Decreases

Stays the same

Increases

None of the above

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?

3

2

5

None of the above

Quiz/Test Summary
Title: Regulated DC Power Supply
Questions: 18
Contributed by:
Diego