HomeElectronics Multiple choice question MCQ online testmcq on voltage regulator and power supply mcq on voltage regulator and power supply Leave a Comment / Electronics Multiple choice question MCQ online test Spread the love 0% 0 votes, 0 avg Created on September 14, 2022DC Power supply Regulated DC power supply MCQ 1 / 56 Zener diode can be used as ………… a. both d.c. and a.c. voltage regulator b. none of the above c. dc voltage regulator only d. ac voltage regulator only 2 / 56 Which transformer is used in a regulated DC power supply? a. Both a or b b. Step down c. Step up d. None of the above 3 / 56 The load regulation of the switching DC power supply is a. 0.10-0.1% b. 0.15-0.1% c. 0.1-1.0% d. 0.05-0.1% 4 / 56 The output of the rectification is ................ a. None of the above b. Unidirectional c. Multidirectional d. Bidirectional 5 / 56 If the load current drawn by unregulated power supply increases, the d.c. output voltage ……….. a. Increases b. None of the above c. Stays the same d. Decreases 6 / 56 How many diodes does the center tapped full wave rectifier consists of? a. Two b. Five c. Six d. One 7 / 56 The input voltage range of linear power supply is around a. ±30% b. ±10% c. ±50% d. ±40% 8 / 56 For increasing the voltage rating, zeners are connected in ………….. a. None of the above b. Series c. Parallel d. Series-parallel 9 / 56 filter is used to obtain DC voltage with some ripple a. Capacitor filter b. None of the above c. LC filter d. RC filter 10 / 56 The ripple factor of the center tapped full-wave rectifier is a. 110% b. 100% c. 48% d. 10% 11 / 56 The rectifiers are categorized into a. Four b. Three c. One d. Two Half wave and Full wave rectifier 12 / 56 The ripple factor of half-wave rectifier is a. 110% b. 121% c. 100% d. 10% 13 / 56 If the load current drawn by unregulated power supply increases, the d.c. output voltage ……… a. Stays the same b. Decreases c. Increases d. None of the above 14 / 56 The Zener current is maximum when the load current is a. one b. infinity c. zero d. None of the above 15 / 56 In a Zener voltage regulator, the changes in load current produce changes in ……………. a. Zener voltage b. None of the above c. Zener current d. Zener voltage as well as Zener current 16 / 56 A regulated DC power supply is also known as a. None of the above b. linear power supply c. hyper power supply d. dual power supply 17 / 56 The maximum rectification efficiency of the center tapped full-wave rectifier is a. 30% b. 40% c. 10% d. 81.2% 18 / 56 The output voltage of a switch-mode power supply is a. Less b. More c. More or less d. very less 19 / 56 The AC component present in output voltage is called a. None b. Non-linear regulators c. Switching regulator d. Ripple 20 / 56 The output obtained by the rectifier is a. Pulsating DC b. None c. Pulsating AC d. Non-pulsating AC 21 / 56 The Zener current will be minimum when ………… a. Load current is maximum b. Load current is zero c. Load current is minimum d. None of the above 22 / 56 A Zener regulator …………… in the power supply a. Decreases the ripple b. Data insufficient c. Neither increases nor decreases the ripple d. Increases the ripple 23 / 56 The diode is a _______ device a. Linear b. Dynamic c. Static d. Non-linear 24 / 56 Rectification can be done by using a. Bridge rectifiers b. None of the above c. Conductors d. Transformers 25 / 56 The input linear filter is required in a. Linear power supply b. None of the above c. Both a and b d. SMPS 26 / 56 The transient response of linear power supply is around a. 120µs b. 20µs c. 10µs d. 100µs 27 / 56 Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 45 V b. 15 V c. 30 V d. 5 V 28 / 56 The noise of the switching DC power supply is a. 100mv-200mv b. 70mv-200mv c. 60mv-200mv d. 50mv-200mv 29 / 56 The disadvantages of linear DC power supply are a. Costly b. Efficiency is low c. All of the above d. Large size 30 / 56 The maximum rectification efficiency of half-wave rectifier is around a. 30% b. 40% c. 10% d. 20% 31 / 56 Output of a phase splitter is a. a pair of sine waves of unequal amplitude b. a pair of sine waves of equal amplitudes and opposite phase c. a pair of sine waves of unequal amplitudes and opposite phase d. a pair of sine waves of equal amplitudes 32 / 56 ..............rectifiers are full-wave rectifiers a. None of the above b. Bridge c. Both a and b d. Center-tapped 33 / 56 A power supply has a voltage regulation of 1%. If the no-load voltage is 20 V, what is the full-load voltage? a. 2 V b. 6V c. 7 V d. 8 V 34 / 56 Which transformer increases the voltage? a. Step up b. None of the above c. Both a and b d. Step down 35 / 56 are the building blocks of regulated DC power supply a. Regulator b. Step down transformer c. Rectifier, DC filter d. All of the above 36 / 56 How many diodes does bridge full-wave rectifier consists a. One b. Three c. Four d. Two 37 / 56 The unregulated power supply used in a. Solenoids b. Actuators c. Relays d. All of the above 38 / 56 How many diodes does half-wave rectifier consists of a. One b. Six c. Three d. Five 39 / 56 An ideal regulated power supply is one which has voltage regulation of ………… a. 10% b. 0% c. 5% d. 1% 40 / 56 Commercial power supplies have voltage regulation …………. a. of 25% b. of 15% c. within 1% d. of 10% 41 / 56 In an unregulated power supply, if load current increases, the output voltage ……….. a. Remains the same b. Increases c. Decreases d. None of the above 42 / 56 How many types of regulated power supplies are there? a. Four b. Three c. Two d. One Hint Adjustable voltage regulator Zener diode regulators Current limiters Series regulators 43 / 56 If the load resistance decreases in a Zener regulator, then Zener current ……………. a. Decreases b. Increases c. Stays the same d. None of the above 44 / 56 In switch-mode power supply the regulation of voltage is done by controlling a. None of the above b. Voltage range c. Both a and b d. Duty cycle 45 / 56 The hold-up time of linear power supply is around a. 10ms-20ms b. 20ms-30ms c. 1ms-2ms d. None of the above 46 / 56 The advantages of linear DC power supply are a. Output noise is low b. Common mode noise current is low c. Output transient response is fast d. All of the above 47 / 56 Regulated power supplies are used in .................. a. All of the above b. Measurement devices c. Computers d. Mobile chargers 48 / 56 The switch-mode power supply categorized into a. One b. Six c. Three d. Four Hint AC in DC out DC in DC out DC in AC out AC in AC out 49 / 56 The efficiency of linear power supply is around a. 10-20% b. 20-30% c. 15-20% d. 30-40% 50 / 56 The rectification is a process of converting............. a. Alternating current into direct quantity b. Alternating current or voltage into direct quantity c. Alternating voltage into direct quantity d. Alternating current or voltage into direct quantity 51 / 56 The maximum rectification efficiency of bridge full-wave rectifier is around a. 30% b. 81.2% c. 40% d. 10% 52 / 56 allows DC but it blocks AC a. Inductor b. None c. Conductor d. Insulator 53 / 56 Which filter reduces the ripple? a. RC filter b. Capacitor filter c. LC filter d. None of the above 54 / 56 In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Increases b. None of the above c. Remains the same d. Decreases 55 / 56 A power supply which has voltage regulation of ……….. is unregulated power supply a. 0 % b. 5 % c. 8% d. 10 % 56 / 56 When load current is zero, the Zener current will be ……… a. None of the above b. Zero c. Minimum d. Maximum Your score isThe average score is 24% LinkedIn Facebook VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
