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