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