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 The disadvantages of linear DC power supply are a. Large size b. All of the above c. Costly d. Efficiency is low 2 / 56 The output of the rectification is ................ a. None of the above b. Unidirectional c. Multidirectional d. Bidirectional 3 / 56 A regulated DC power supply is also known as a. dual power supply b. linear power supply c. hyper power supply d. None of the above 4 / 56 How many diodes does the center tapped full wave rectifier consists of? a. One b. Five c. Six d. Two 5 / 56 allows DC but it blocks AC a. Conductor b. Insulator c. None d. Inductor 6 / 56 How many types of regulated power supplies are there? a. Four b. Two c. One d. Three Hint Adjustable voltage regulator Zener diode regulators Current limiters Series regulators 7 / 56 Regulated power supplies are used in .................. a. Computers b. Mobile chargers c. Measurement devices d. All of the above 8 / 56 In a Zener voltage regulator, the changes in load current produce changes in ……………. a. Zener current b. Zener voltage as well as Zener current c. Zener voltage d. None of the above 9 / 56 Output of a phase splitter is a. a pair of sine waves of equal amplitudes b. a pair of sine waves of unequal amplitudes and opposite phase c. a pair of sine waves of unequal amplitude d. a pair of sine waves of equal amplitudes and opposite phase 10 / 56 How many diodes does half-wave rectifier consists of a. Six b. Three c. Five d. One 11 / 56 The AC component present in output voltage is called a. Non-linear regulators b. Switching regulator c. Ripple d. None 12 / 56 The noise of the switching DC power supply is a. 60mv-200mv b. 50mv-200mv c. 100mv-200mv d. 70mv-200mv 13 / 56 The maximum rectification efficiency of half-wave rectifier is around a. 20% b. 10% c. 30% d. 40% 14 / 56 A Zener regulator …………… in the power supply a. Neither increases nor decreases the ripple b. Increases the ripple c. Decreases the ripple d. Data insufficient 15 / 56 The output voltage of a switch-mode power supply is a. More or less b. Less c. More d. very less 16 / 56 When load current is zero, the Zener current will be ……… a. Minimum b. Zero c. None of the above d. Maximum 17 / 56 The ripple factor of half-wave rectifier is a. 121% b. 100% c. 10% d. 110% 18 / 56 If the load resistance decreases in a Zener regulator, then Zener current ……………. a. None of the above b. Stays the same c. Decreases d. Increases 19 / 56 The maximum rectification efficiency of the center tapped full-wave rectifier is a. 81.2% b. 10% c. 40% d. 30% 20 / 56 For increasing the voltage rating, zeners are connected in ………….. a. Series b. Series-parallel c. Parallel d. None of the above 21 / 56 If the load current drawn by unregulated power supply increases, the d.c. output voltage ……… a. Decreases b. Increases c. None of the above d. Stays the same 22 / 56 The efficiency of linear power supply is around a. 10-20% b. 30-40% c. 15-20% d. 20-30% 23 / 56 Zener diode can be used as ………… a. ac voltage regulator only b. none of the above c. both d.c. and a.c. voltage regulator d. dc voltage regulator only 24 / 56 Which filter reduces the ripple? a. Capacitor filter b. LC filter c. RC filter d. None of the above 25 / 56 An ideal regulated power supply is one which has voltage regulation of ………… a. 10% b. 5% c. 0% d. 1% 26 / 56 ..............rectifiers are full-wave rectifiers a. Both a and b b. Bridge c. Center-tapped d. None of the above 27 / 56 The load regulation of the switching DC power supply is a. 0.05-0.1% b. 0.1-1.0% c. 0.10-0.1% d. 0.15-0.1% 28 / 56 The switch-mode power supply categorized into a. One b. Three c. Four d. Six Hint AC in DC out DC in DC out DC in AC out AC in AC out 29 / 56 The transient response of linear power supply is around a. 20µs b. 100µs c. 10µs d. 120µs 30 / 56 In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Decreases b. None of the above c. Increases d. Remains the same 31 / 56 A power supply which has voltage regulation of ……….. is unregulated power supply a. 5 % b. 10 % c. 8% d. 0 % 32 / 56 Which transformer is used in a regulated DC power supply? a. Step down b. None of the above c. Both a or b d. Step up 33 / 56 The rectifiers are categorized into a. Two b. Three c. One d. Four Half wave and Full wave rectifier 34 / 56 If the load current drawn by unregulated power supply increases, the d.c. output voltage ……….. a. Stays the same b. None of the above c. Increases d. Decreases 35 / 56 The input voltage range of linear power supply is around a. ±50% b. ±30% c. ±40% d. ±10% 36 / 56 Which transformer increases the voltage? a. Step down b. None of the above c. Step up d. Both a and b 37 / 56 The output obtained by the rectifier is a. Non-pulsating AC b. Pulsating DC c. Pulsating AC d. None 38 / 56 How many diodes does bridge full-wave rectifier consists a. Four b. Three c. Two d. One 39 / 56 The advantages of linear DC power supply are a. Common mode noise current is low b. Output noise is low c. Output transient response is fast d. All of the above 40 / 56 The hold-up time of linear power supply is around a. 10ms-20ms b. 1ms-2ms c. None of the above d. 20ms-30ms 41 / 56 The unregulated power supply used in a. All of the above b. Relays c. Solenoids d. Actuators 42 / 56 The rectification is a process of converting............. a. Alternating current into direct quantity b. Alternating current or voltage into direct quantity c. Alternating current or voltage into direct quantity d. Alternating voltage into direct quantity 43 / 56 The diode is a _______ device a. Dynamic b. Linear c. Non-linear d. Static 44 / 56 In switch-mode power supply the regulation of voltage is done by controlling a. Both a and b b. Voltage range c. Duty cycle d. None of the above 45 / 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. 7 V b. 6V c. 2 V d. 8 V 46 / 56 Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 15 V b. 5 V c. 30 V d. 45 V 47 / 56 are the building blocks of regulated DC power supply a. All of the above b. Step down transformer c. Rectifier, DC filter d. Regulator 48 / 56 filter is used to obtain DC voltage with some ripple a. None of the above b. Capacitor filter c. RC filter d. LC filter 49 / 56 The Zener current will be minimum when ………… a. Load current is zero b. Load current is minimum c. Load current is maximum d. None of the above 50 / 56 The maximum rectification efficiency of bridge full-wave rectifier is around a. 40% b. 10% c. 81.2% d. 30% 51 / 56 In an unregulated power supply, if load current increases, the output voltage ……….. a. Increases b. Decreases c. None of the above d. Remains the same 52 / 56 Commercial power supplies have voltage regulation …………. a. of 10% b. within 1% c. of 25% d. of 15% 53 / 56 Rectification can be done by using a. None of the above b. Conductors c. Bridge rectifiers d. Transformers 54 / 56 The Zener current is maximum when the load current is a. None of the above b. infinity c. zero d. one 55 / 56 The ripple factor of the center tapped full-wave rectifier is a. 48% b. 10% c. 110% d. 100% 56 / 56 The input linear filter is required in a. None of the above b. SMPS c. Both a and b d. Linear power supply Your score isThe average score is 24% LinkedIn Facebook VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
