Interview Questions.

Question 1. What Is A Dc Power Supply?

Answer :The a part of the system that converts ac into dc is called dc power supply.

Question 2. Define What Is A Rectifier?

Answer :A rectifier is a tool which converts alternating present day (or voltage) into unidirectional cutting-edge (or voltage).

Electrical and Electronics Engineering Interview Questions
Question three. What Is Piv Of A Diode In A Rectifier Circuit?

Answer :Peak Inverse Voltage (PIV) is the most feasible voltage that takes place across a diode whilst it is reverse biased.

Question four. What Is The Importance Of Peak Inverse Voltage?

Answer :If the applied voltage in opposite biased circumstance exceeds peak inverse voltage (PIV) rating of the diode, then the diode may get damaged.

Question 5. Define Why Half-wave Rectifiers Are Generally Not Used In Dc Power Supply?

Answer :The form of deliver available from 1/2-wave rectifier isn't always quality for widespread power deliver. That is Define why it's far generally not used in dc strength supply.

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Question 6. Define Why Diodes Are Not Operated In The Breakdown Region In Rectifiers?

Answer :In breakdown place, a diode has a chance of getting damaged or burnt due to the fact the value of cutting-edge flowing through it will increase in an uncontrollable way. That is Define why didoes aren't operated within the breakdown place in rectifiers.

Question 7. Ripple As Referred To In A Rectifier Circuit.

Answer :The ac component contained within the pulsating output of a rectifier is called ripple.

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Question eight. What Is Transformer Utilization Factor?

Answer :Transformer usage thing is described because the ratio of strength brought to the burden and ac score of secondary of deliver energy transformer.

Question 9. The Output Of A 60hz Full-wave Bridge Rectifier Has A 60 Hz Ripple. It This Circuit Working Properly?

Answer :

A complete-wave rectifier with 60Hz input need to have lowest ripple frequency same to twice the input frequency i.E. 120Hz. If the ripple frequency is 60Hz, it manner some diodes in the circuit are not operating.

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Question 10. Define What Is Meant By Filter?

Answer :Filter is a tool that converts pulsating output of rectifier into a constant dc stage.

Question eleven. Define Why Series Inductor And L-section Filters Cannot Be Used With Half-wave Rectifiers?

Answer :Series inductor and L-phase filters can not be used with 1/2-wave rectifiers due to the fact operation of collection inductor relies upon upon the current via it and desires a minimal modern to float always.

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Question 12. Why Capacitor Input Filter Is Preferred To Choke Input Filter?

Answer :In capacitor enter clear out, the dc output is a whole lot larger and ripples are less in contrast to the ones in choke input filter. So, capacitor input filter is preferred to choke enter filter out.

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Question 13. Why π-filters Are Not Suitable For Varying Loads?

Answer :Voltage regulation in case of π-filters could be very poor and, therefore, π-filters aren't appropriate for various hundreds.

Question 14. Define Why R-c Filters Are Suitable Only For Light Loads?

Answer :R-C filters have terrible voltage law and want ok ventilation to use up the heat developed inside the resistor R. Thus R-C filters are suitable most effective for light loads.

Question 15. Why Is Bleeder Resistance Employed In A Filter Circuit?

Answer :

A resistance, known as the bleeder resistance, is positioned throughout the filter out output, to provide go with the flow of necessary minimal present day via the choke in any respect time.

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Question sixteen. What Is The Purpose Of Bleeder Resistance In A Rectifier Circuit Using L-c Filter?

Answer :Bleeder resistance RB is placed in parallel with the burden in an effort to hold a sure minimum contemporary thru the choke, even the weight resistor receives open-circuited, and improves filtering motion.

Question 17. Define What Is Meant By Voltage Regulation Of A Dc Power Supply?

Answer :

The exchange in voltage from no-load to full-load condition is called voltage regulation.

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Question 18. Why Is It Necessary To Include Voltage Stabilizer In A Power Supply?

Answer :

The significance of output dc voltage may additionally vary with the version of both the enter ac voltage or the importance of load contemporary. So at the output of a rectifier-filter out combination a voltage stabilizer is required.

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