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