Regulated Dc Power Supply MCQs with Explanations

Zero is the correct answer to “A Zener voltage regulator will cease to act as a voltage regulator if Zener current becomes ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Decreases is the correct answer to “If the load resistance decreases in a Zener regulator, then Zener current ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Decreases the ripple is the correct answer to “A Zener regulator ___________ in the power supply”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Silicon is the correct answer to “Zener diode are generally made of ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Decreases is the correct answer to “In an unregulated power supply, if load current increases, the output voltage ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Decreases is the correct answer to “If the load current drawn by unregulated power supply increases, the d.c. output voltage ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

More than is the correct answer to “A 30 V Zener will have depletion layer width ___________ that of 10 V Zener”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Small is the correct answer to “A Zener voltage regulator is used for ___________ load currents”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Zener is the correct answer to “A Zener diode that has very narrow depletion layer will breakdown by mechanism”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Zener current is the correct answer to “In a Zener voltage regulator, the changes in load current produce changes in ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

30 V is the correct answer to “Two similar 15 V Zeners are connected in series. What is the regulated output voltage”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

0% is the correct answer to “An ideal regulated power supply is one which has voltage regulation of ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

5% is the correct answer to “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”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Operating in the breakdown region is the correct answer to “The load voltage is approximately constant when a Zener diode is ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

8 V is the correct answer to “A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

50 Ω is the correct answer to “In a regulated power supply, two similar 15 V zeners are connected in series. The input voltage is 45 V d.c. If each Zener has a maximum current rating of 300 mA, what should be the value of the series resistance”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Is decreased is the correct answer to “As the junction temperature increases, the voltage breakdown point for Zener mechanism ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Increases is the correct answer to “As the junction temperature increases, the voltage breakdown point for avalanche mechanism ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Series is the correct answer to “For increasing the voltage rating, zeners are connected in ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Maximum is the correct answer to “When load current is zero, the Zener current will be”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Acts like a battery in the breakdown region is the correct answer to “A Zener diode ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

More than 105 V/cm is the correct answer to “The rupture of covalent bonds will occur when the electric field is ___________.”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

It is approximately constant is the correct answer to “What is true about the breakdown voltage in a Zener diode”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Shunt is the correct answer to “A Zener diode is used as a ___________ voltage regulating device”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

10% is the correct answer to “A power supply which has voltage regulation of ___________ is unregulated power supply”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

within 1% is the correct answer to “Commercial power supplies have voltage regulation ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Is decreased is the correct answer to “If the doping level is increased, the breakdown voltage of the Zener ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Breakdown is the correct answer to “Another name for Zener diode is ___________ diode”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Both (A) and (B) is the correct answer to “The current in a Zener diode is limited by ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Load current is maximum is the correct answer to “The Zener current will be minimum when ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

It is a constant-voltage device is the correct answer to “Which of these is the best description for a Zener diode”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Avalanche mechanism is the correct answer to “In a 15 V Zener diode , the breakdown mechanism will occur by ___________”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Reverse is the correct answer to “A Zener diode utilises ___________ characteristic for voltage regulation”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Series current is the correct answer to “In a loaded Zener regulator, which is the largest Zener current”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

40 Ω is the correct answer to “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”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

3.09 is the correct answer to “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”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.

Increases is the correct answer to “In an unregulated power supply, if input a.c. voltage increases, the output voltage .”. This question is standard in competitive examination syllabi for Regulated Dc Power Supply.