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