Switching Regulator MCQ

Test your knowledge with important Switching Regulator MCQ and their applications. These MCQs are beneficial for competitive exams too. Explore 30 + more Switching Regulator MCQs at Bissoy

• Find the value of Rsc, L and Co for a µA7840 switching regulator to provide +5 v at 3A, using the following specifications: toff= 24µs, ripple voltage = 400mA and ton=26µs.
  ক

  Rsc = 55 mΩ , L = 25µH & Co = 750µF

  খ

  Rsc = 550 mΩ , L = 25µH & Co = 75µF

  গ

  Rsc = 650 mΩ , L = 25µH & Co = 65µF

  ঘ

  Rsc = 720 mΩ , L = 25µH & Co = 250µF
• Which is the most commonly used low voltage switching regulators?
  ক

  Powdered Permalloy toroids

  খ

  Fermite EI, U and toroid cores

  গ

  Silicon steel EI butt stacks

  ঘ

  None of the mentioned
• Which of the following is considered to be the most important components of the switching regulator?
  ক

  RC or RLC filter

  খ

  RL or RLC filter

  গ

  ORC or RL filter

  ঘ

  RC, RLC or RL filter
• Filter used in switching regulator’s are also as called
  ক

  DC – AC transformers

  খ

  AC – DC transformers

  গ

  DC transformer

  ঘ

  AC transformer
• What should be the frequency range of pulse generator?
  ক

  250 kHz

  খ

  40 kHz

  গ

  120 kHz

  ঘ

  20 kHz
• Which among the following act as a switch in switching regulator?
  ক

  Rectifiers

  খ

  Diode

  গ

  Transistors

  ঘ

  Relays
• What are the conditions to be satisfied by a voltage source for using it in switching regulator. i. It must supply the required output power and the losses associated with the switching regulator ii. It must be large enough to supply sufficient dynamic range line and load variations iii. It must be sufficient high to meet the minimum requirement of the regulator system to be designed iv. It may be required to store energy for a specified amount of time during power failure especially if the system is designed for a computer power supply.
  ক

  i and iii

  খ

  i, ii, iii and iv

  গ

  ii, iii and iv

  ঘ

  i, iii and iv
• The switching regulators can operate in
  ক

  Step up

  খ

  Step down

  গ

  Polarity inverting

  ঘ

  All the mentioned
• A series switching regulators
  ক

  Improves the efficiency of regulators

  খ

  Improves the flexibility of switching

  গ

  Enhance the response of regulators

  ঘ

  All of the mentioned
• Linear series regulators are suited for application with
  ক

  High current

  খ

  Medium current

  গ

  Low current

  ঘ

  None of the mentioned
• Fixed voltage regulators and adjustable regulators are often called as
  ক

  Series dissipative regulators

  খ

  Shunt dissipative regulators

  গ

  Stray dissipative regulators

  ঘ

  All the mentioned
• What is done in switching regulators to minimize its power dissipation during switching?
  ক

  Uses external transistor

  খ

  Uses 1mH choke

  গ

  Uses external transistor and 1mH choke

  ঘ

  None of the mentioned