PPSCFPSCNTSPakistan govt jobs
- Subject
- Regulated D.C. Power Supplyelectrical-engineering-mcqs › regulated-d-c-power-supply
- Published
- 22 Dec 2018
- Last updated
- 28 May 2026
Explanation
A Zener diode is commonly used to regulate voltage in DC circuits, but it is not suitable for regulating AC voltage. Therefore, it functions effectively as a DC voltage regulator only.
More Regulated D.C. Power Supply MCQs
Practice related questions from the same subject.
- 1.A power supply exhibits a voltage regulation of 1%. Given that the voltage at no load is 20 V, what is the voltage when the supply is fully loaded?
- 2.In a regulated power supply setup, two identical 15 V Zener diodes are connected in series, and the input DC voltage is 45 V. If each Zener diode has a maximum current rating of 300 mA, what value of series resistor should be used?
- 3.What happens to the Zener current when there is no load current flowing?
- 4.A power source provides a maximum current of 0.5 A at its full-load voltage of 20 V. What is the smallest load resistance that can be safely connected to this power supply?
- 5.What effect does a Zener regulator have on the ripple voltage in a power supply?
- 6.When does the Zener diode current reach its lowest value?
- 7.If two identical 15 V Zener diodes are connected in series, what will be the total regulated output voltage?
- 8.If the alternating current (a.c.) input voltage to a regulated or standard power supply rises by 5%, what is the approximate percentage change in the direct current (d.c.) output voltage?
More in Electrical Engineering Mcqs
- A.C. Fundamentals, Circuits and Circuit Theory
- Amplifiers with Negative Feedback
- Analog Electronics
- Basic Electrical Mcqs
- Cables
- Control Systems
- D.C. Generators
- D.C. Motors
- Digital Electronics
- Earthing or Grounding
- Economics of Power Generation
- Electric Traction
- Electrical Engineering Materials
- Electrical Machine Design
- Electrolysis and Storage of Batteries
- Electromagnetic Induction
- Electronic instruments
- Electrostatics
- Field Effect Transistors - FET
- Heating and Welding
- Hybrid Parameters
- Industrial Drives
- Magnetic Circuit
- Magnetism and Electromagnetism
- Measurement and Instrumentation
- Modulation and Demodulation
- Multi-Stage Transistor Amplifiers
- Network Theorems
- OP-AMP Circuits
- Operational Amplifier
- Oscillators
- Parallel Circuits
- Passive Filters
- Polyphase Induction Motors
- Power Electronics
- Power Generation
- Rectifiers and Converters
- SCR (Silicon Controlled Rectifiers)
- Semiconductor Diode
- Semiconductor Theory
- Series-parallel Circuits
- Single Phase Induction Motors
- Single Stage Transistor Amplifiers
- Solid-State Switching Circuits
- Switchgear and Protection
- Synchronous Motors
- TRANSISTORS
- Transformers
- Transistor Audio Power Amplifiers
- Transistor Biasing
- Transistor Tuned Amplifiers
- Transmission and Distribution
- integrated Circuits