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