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 How many diodes does half-wave rectifier consists of a. Five b. Three c. One d. Six 2 / 56 The diode is a _______ device a. Static b. Dynamic c. Linear d. Non-linear 3 / 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 4 / 56 Which filter reduces the ripple? a. None of the above b. Capacitor filter c. RC filter d. LC filter 5 / 56 The output voltage of a switch-mode power supply is a. very less b. Less c. More or less d. More 6 / 56 The maximum rectification efficiency of bridge full-wave rectifier is around a. 10% b. 40% c. 30% d. 81.2% 7 / 56 How many types of regulated power supplies are there? a. Two b. Three c. Four d. One Hint Adjustable voltage regulator Zener diode regulators Current limiters Series regulators 8 / 56 How many diodes does the center tapped full wave rectifier consists of? a. One b. Six c. Two d. Five 9 / 56 allows DC but it blocks AC a. Inductor b. None c. Insulator d. Conductor 10 / 56 The input linear filter is required in a. None of the above b. Linear power supply c. Both a and b d. SMPS 11 / 56 The rectification is a process of converting............. a. Alternating voltage into direct quantity b. Alternating current or voltage into direct quantity c. Alternating current into direct quantity d. Alternating current or voltage into direct quantity 12 / 56 If the load current drawn by unregulated power supply increases, the d.c. output voltage ……….. a. Decreases b. Stays the same c. Increases d. None of the above 13 / 56 The maximum rectification efficiency of the center tapped full-wave rectifier is a. 40% b. 30% c. 10% d. 81.2% 14 / 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. 8 V c. 7 V d. 6V 15 / 56 The transient response of linear power supply is around a. 20µs b. 10µs c. 120µs d. 100µs 16 / 56 An ideal regulated power supply is one which has voltage regulation of ………… a. 0% b. 1% c. 5% d. 10% 17 / 56 The load regulation of the switching DC power supply is a. 0.15-0.1% b. 0.05-0.1% c. 0.10-0.1% d. 0.1-1.0% 18 / 56 For increasing the voltage rating, zeners are connected in ………….. a. Series-parallel b. None of the above c. Series d. Parallel 19 / 56 The advantages of linear DC power supply are a. Output transient response is fast b. Common mode noise current is low c. Output noise is low d. All of the above 20 / 56 In a Zener voltage regulator, the changes in load current produce changes in ……………. a. Zener voltage b. Zener voltage as well as Zener current c. Zener current d. None of the above 21 / 56 Commercial power supplies have voltage regulation …………. a. of 15% b. within 1% c. of 25% d. of 10% 22 / 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 23 / 56 Two similar 15 V Zeners are connected in series. What is the regulated output voltage? a. 30 V b. 15 V c. 45 V d. 5 V 24 / 56 In an unregulated power supply, if load current increases, the output voltage ……….. a. Remains the same b. None of the above c. Increases d. Decreases 25 / 56 The output obtained by the rectifier is a. Non-pulsating AC b. None c. Pulsating AC d. Pulsating DC 26 / 56 filter is used to obtain DC voltage with some ripple a. RC filter b. Capacitor filter c. LC filter d. None of the above 27 / 56 How many diodes does bridge full-wave rectifier consists a. One b. Four c. Two d. Three 28 / 56 Which transformer increases the voltage? a. None of the above b. Step down c. Both a and b d. Step up 29 / 56 ..............rectifiers are full-wave rectifiers a. Bridge b. Center-tapped c. None of the above d. Both a and b 30 / 56 Zener diode can be used as ………… a. dc voltage regulator only b. ac voltage regulator only c. both d.c. and a.c. voltage regulator d. none of the above 31 / 56 The maximum rectification efficiency of half-wave rectifier is around a. 30% b. 40% c. 20% d. 10% 32 / 56 The Zener current will be minimum when ………… a. None of the above b. Load current is minimum c. Load current is zero d. Load current is maximum 33 / 56 The disadvantages of linear DC power supply are a. Efficiency is low b. Costly c. All of the above d. Large size 34 / 56 The hold-up time of linear power supply is around a. 20ms-30ms b. 10ms-20ms c. None of the above d. 1ms-2ms 35 / 56 The switch-mode power supply categorized into a. Three b. One c. Four d. Six Hint AC in DC out DC in DC out DC in AC out AC in AC out 36 / 56 The ripple factor of half-wave rectifier is a. 10% b. 110% c. 100% d. 121% 37 / 56 The input voltage range of linear power supply is around a. ±10% b. ±30% c. ±40% d. ±50% 38 / 56 The efficiency of linear power supply is around a. 30-40% b. 15-20% c. 10-20% d. 20-30% 39 / 56 The Zener current is maximum when the load current is a. one b. None of the above c. infinity d. zero 40 / 56 are the building blocks of regulated DC power supply a. Step down transformer b. All of the above c. Regulator d. Rectifier, DC filter 41 / 56 Rectification can be done by using a. Bridge rectifiers b. None of the above c. Conductors d. Transformers 42 / 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 43 / 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 equal amplitudes and opposite phase c. a pair of sine waves of unequal amplitude d. a pair of sine waves of equal amplitudes 44 / 56 The noise of the switching DC power supply is a. 50mv-200mv b. 60mv-200mv c. 100mv-200mv d. 70mv-200mv 45 / 56 The rectifiers are categorized into a. Three b. Two c. Four d. One Half wave and Full wave rectifier 46 / 56 The output of the rectification is ................ a. Unidirectional b. Multidirectional c. Bidirectional d. None of the above 47 / 56 When load current is zero, the Zener current will be ……… a. Maximum b. None of the above c. Minimum d. Zero 48 / 56 A power supply which has voltage regulation of ……….. is unregulated power supply a. 0 % b. 8% c. 10 % d. 5 % 49 / 56 The AC component present in output voltage is called a. Non-linear regulators b. Switching regulator c. Ripple d. None 50 / 56 In an unregulated power supply, if input a.c. voltage increases, the output voltage ……. a. Decreases b. Increases c. Remains the same d. None of the above 51 / 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 52 / 56 The ripple factor of the center tapped full-wave rectifier is a. 48% b. 10% c. 110% d. 100% 53 / 56 The unregulated power supply used in a. Solenoids b. Relays c. Actuators d. All of the above 54 / 56 Regulated power supplies are used in .................. a. Mobile chargers b. Computers c. Measurement devices d. All of the above 55 / 56 A regulated DC power supply is also known as a. hyper power supply b. None of the above c. dual power supply d. linear power supply 56 / 56 In switch-mode power supply the regulation of voltage is done by controlling a. Duty cycle b. Voltage range c. None of the above d. Both a and b Your score isThe average score is 24% LinkedIn Facebook VKontakte 0% Restart quiz Exit Anonymous feedback Thank you Send feedback Spread the love
