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