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