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