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