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