search
person

1 Answer

Full wave rectified both time of positive and negative half cycle of ac.for thaat purpose two diodes are use.but in two diode case we have to use  centre trap transformer.to overcome on this disadvantage we use bridge rectifire having four diodes
thumb_up_alt 0 like thumb_down_alt 0 dislike

Related questions

Description : Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

Answer : 1. In positive half cycle (0 to Π): The end A of the secondary winding becomes positive and end B negative. This makes diode D1 and D4 forward biased while diode D2 and D3 are reverse biased. These two diodes will ... D2 and D3 when it is conducting is as follows.  B - D2 - RL - D3 - A 

Description : Draw the circuit diagram and describe the working principle of full wave bridge rectifier. Draw its waveforms. 

Answer : During the first half cycle : During the first half cycle of the input voltage, the upper end of the transformer secondary winding is positive with respect to the lower end. Thus during the first ... , terminal D, diode D4, and terminal A back to transformer and output will positive half cycle.

Description : Draw the circuit diagram of shunt capacitor filter along with full wave rectifier. Draw the waveform of full wave rectifier output and shunt capacitor filter output.

Answer : Fig: Shunt capacitor filter along with full wave rectifier Fig: Waveform of full wave rectifier output and shunt capacitor filter output.

Description : Draw and describe working of full wave rectifier using centre tapped transformer.

Answer : Full wave Rectifier with Center tapped transformer(FWR): In full wave rectification, the rectifier conducts in both the cycles as two diodes are connected. Circuit diagram: Operation: 1. In ... both half-cycles of input AC voltage. Therefore DC is obtained across the load RL.

Description : Compare half wave rectifier and full wave rectifier. 

Answer : half wave rectifier and full wave rectifier :

Description : Draw circuit diagram and waveforms for centre-tap full wave rectifier.

Answer : Circuit Diagram:    

Description : Explain with neat sketch, the working of full wave rectifier voltmeter.

Answer : Full Wave Rectifier Type Voltmeter: Working of full wave rectifier type A. C. Voltmeter Referring to the circuit diagram, for rectification, a full wave bridge circuit (ABCD) is used. Input ... current passing through meter is given as, which causes full scale deflection of the meter.

Description : Define rectifier. Draw circuit diagram and input-output waveforms of bridge type full wave rectifier 

Answer : Rectifier - This circuit convert AC signal into DC.

Description : Explain Center-tapped full wave rectifier with the help of circuit diagram and draw input output waveforms. 

Answer : Operation : During positive half cycle of an AC supply, D1 will forward biased and current starts flowing through load. The output voltage is equal to +Vs. During negative half cycle of an AC ... output voltage is equal to +Vs. In this pulsating DC waveform will be obtained at the load. 

Description : In a full wave rectifier with input frequency of 50 Hz, the frequency of the output is: (1) 50 Hz (2) 100 Hz (3) 150 Hz (4) 200 Hz

Answer : In a full wave rectifier with input frequency of 50 Hz, the frequency of the output is: 100 Hz

Description : In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is: (1) 30 V (2) 60 V (3) 15 V (4) 10 V

Answer : In a full wave rectifier circuit using centre tapped transformer, the peak voltage across half of the secondary winding is 30 V. Then PIV is: 60 V

Description : In a full wave rectifier the negative point in a circuit is   (A) cathode (B) anode (C) The central tap on the high voltage secondary (D) plate.

Answer : In a full wave rectifier the negative point in a circuit is The central tap on the high voltage secondary 

Description : The transformer utilization factor of full wave bridge rectifier is   (A) 0.812 (B) 0.286 (C) 0.693 (D) 0.782

Answer : The transformer utilization factor of full wave bridge rectifier is 0.286 

Description : The input frequency is 50 Hz. The ripple frequency in a 12 phase full wave rectifier is (A) 1200 Hz (B) 600 Hz (C) 100 Hz (D) 50 Hz 

Answer : The input frequency is 50 Hz. The ripple frequency in a 12 phase full wave rectifier is 1200 Hz

Description : Rectification efficiency of a full wave rectifier without filter is nearly equals to:  (1) 51% (2) 61% (3) 71% (4) 81%

Answer : Rectification efficiency of a fullwave rectifier without filter is nearly equals to: 81%

Description :

Answer : working of Half wave rectifier The half-wave rectifier circuit using a semiconductor diode (D) with a load resistance RL but no smoothing filter is given in the figure. The diode is ... load. Since only half-cycles of the input wave are used, it is called a half wave rectifier. 

Description : In a three phase half wave rectifier feeding resistive load, if the input source is a three phase 4 wire system and line to line voltage is 100 V. The supply frequency is 400 Hz. The ripple frequency at the output is: (1) 400 Hz (2) 800 Hz (3) 1200 Hz (4) None of these

Answer : In a three phase half wave rectifier feeding resistive load, if the input source is a three phase 4 wire system and line to line voltage is 100 V. The supply frequency is 400 Hz. The ripple frequency at the output is: 1200 Hz

Description : A single phase, half-wave, controlled rectifier has 400 sin (314 t) as the input voltage and R as the load. For a firing angle of 60° for the SCR, the average output voltage is   (a) 240/π (b) 400/π (c) 300/π (d) 200/π 

Answer : C

Description : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz

Answer : In a half-wave rectifier, if an a.c supply is 60 Hz. Then what is the a.c ripple at output? (A) 30 Hz (B) 60 Hz (C) 20 Hz (D) 15 Hz

Description : A single-phase full-bridge diode rectifier delivers a load current of 10A, which is ripple free. Average and rms values of diode currents are respectively   (a) 10A, 7.07A (b) 5A, 10A (c) 5A, 7.07A (d) 7.07A, 5A

Answer : A single-phase full-bridge diode rectifier delivers a load current of 10A, which is ripple free. Average and rms values of diode currents are respectively 5A, 7.07A

Description : The r.m.s. value of a half-wave rectified alternating current is 10 A. Its value for full-wave rectification will be  

Answer : The RMS value of a half-wave rectified current is 10 Ampere. Its value for full-wave rectification would be: 14.14 Ampere

Description :  A single phase full -wave half controlled bridge converter feeds an inductive load: The two SCRs in the converter are connected to a common DC bus. The converter has to have a free wheeling diode (A) Because the converter inherently does not provide for free wheeling (B) Because the converter does not provide for free wheeling for high values of trigger -angles (C) Or else the free wheeling action of the converter will cause shorting of the AC supply (D) Or else if a gate pulse to one of the SCRs is missed, it will subsequently cause a high load current in the other SCR

Description : Explain the working of Half wave rectifier with suitable diagram

Answer : The half-wave rectifier circuit using a semiconductor diode (D) with a load resistance RL but no smoothing filter is given in the figure. The diode is connected in series with the secondary of the ... . Since only half-cycles of the input wave are used, it is called a half wave rectifier. 

Description : Describe working of A.C. voltmeter using half wave rectifier with neat circuit diagram. 

Answer : AC Voltmeter using Half Wave Rectifier : The a.c. voltmeter using half wave rectifier is achieved by introducing a diode in a basic d.c. voltmeter. This is shown in the Fig. 1. The diode D ... can be obtained for a.c. voltmeter as, Where Idc is the full scale deflection current..

Description : operation of half wave rectifier type AC Voltmeter.

Answer :  Half-wave Rectifier Voltmeter The d'Arsonval meter movement only responds to the average or dc value of the current through the moving coil. In order to measure alternating ... ) input voltage signal alternating signal needs to be rectified first by using diode rectifier to produce 

Description : An AC supply of 230 V is applied to half wave rectifier circuit. A transformer turns ratio is 20 : 1. Find i) Output DC voltage (ii) Peak Inverse Voltage (PIV)

Answer : Solution:

Description :  An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V 

Answer :  An AC supply of 230 V is applied to a half-wave rectifier circuit through a transformer having primary to secondary turn’s ratio 12:1. The peak inverse voltage is A) 8.62 V B) 12 V C) 19.17 V D) 27.11 V 

Description : The ripple voltage in the output of a single phase half wave rectifier with 10 V rectified dc voltage with resistive load and without filter will be • 12.1 volt • 1.21 volt • 0.482 volt • 4.82 volt

Answer : The ripple voltage in the output of a single phase half wave rectifier with 10 V rectified dc voltage with resistive load and without filter will be 12.1 volt

Description : In a 3-phase half-wave rectifier, if per phase input is 200 V, then the average output voltage is   (a) 233.91 V (b) 116.95V (c) 202.56 V (d) 101.28V 

Answer : a

Description : Ripple factor for a half wave rectifier is  a. 1.65 b. 1.45 c. 1 d. 1.21 

Answer : Ripple factor for a half wave rectifier is 1.21

Description : Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it. 

Answer : Circuit Diagram: Waveforms:

Description : Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.

Answer : Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.

Description : A single phase full-wave half-controlled bridge converter feeds an inductive load. The two SCRs in the converter are connected to a common DC bus. The converter has to have a freewheeling diode.  (A) because the converter inherently does not provide for free-wheeling (B) because the converter does not provide for free-wheeling for high values of triggering angles (C) or else the free-wheeling action of the converter will cause shorting of the AC supply (D) or else if a gate pulse to one of the SCRs is missed, it will subsequently cause a high load current in the other SCR.

Answer : A single phase full-wave half-controlled bridge converter feeds an inductive load. The two SCRs in the converter are connected to a common DC bus. The converter has to have a freewheeling diode. because the converter does not provide for free-wheeling for high values of triggering angles

Description : a single phase full wave midpoint thyristor converter uses a 230/200V transformer with centre tap on the secondary side. The P.I.V per thyristor is   (A) 100V (B)141.4V (C)200V (D)282.8V

Answer : d

Description : An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to  (1) 1.414 times dc sensitivity (2) dc sensitivity (3) 0.9 times dc sensitivity (4) 0.707 times dc sensitivity

Answer : An ac voltmeter using full -wave rectification and having a sinusoidal input has an ac sensitivity equal to 0.9 times dc sensitivity

Description : Explain three phase full wave controller.

Answer : Three phase full wave controller: Three phase full wave controller is also called as the three-phase bidirectional controller. Let the load is star connected so at each phase there are antiparallel connected SCRs. ... conduct at the same time and the third phase will be open.

Description : need of rectifier and filter. 

Answer : Need of rectifier: Every electronics circuit needs a D.C. power source for its operation. The rectifier circuit is used to convert A.C. supply to unidirectional pulses .  Need of filter: A filter ... only the D.C. components to reach the load. So filter is used to provide ripple free output.

Description : Sketch circuit diagram of bridge rectifier with LC filter. State function of each component.

Answer :  Circuit diagram :  Components and its function: :  1. Transformer- An electrical device which transfers electrical energy from one electric circuit to other, without changing the frequency. The ... DC components.  4. Capacitor- It bypasses AC components if any and gives DC to load. 

Description : Name the type of rectifier for each of following feature : (i) Highest rectifier efficiency (ii) Highest form factor (iii) Two diode rectifier circuit (iv) PIV = 2Vm.

Answer : (i) Highest rectifier efficiency : Center tapped & Bridge full wave Rectifier  (ii) Highest form factor : Center tapped & Bridge full wave Rectifier  (iii) Two diode rectifier circuit : Center tapped full wave Rectifier  (iv) PIV = 2Vm : Center tapped full wave Rectifier

Description : Define the term 'Ripple factor' for rectifier.

Answer : Ripple factor: The ratio of RMS value of ac component present in the waveform to the dc component in the waveform is called as ripple factor.  OR  The unwanted AC components present in output waveform of a rectifier is called as ripple factor.

Description :

In a bridge rectifier 

1. PIV has a value Vm 2. Centre tap of secondary is not required 3. Smaller transformer can be used 4. All 

Answer : In a bridge rectifier  1. PIV has a value Vm 2. Centre tap of secondary is not required 3. Smaller transformer can be used 4. All 

Description : Which rectifier can convert AC to DC? A. Half wave rectifier B. Full wave rectifier C. Bridge wave rectifier D. All of these 

Answer : Which rectifier can convert AC to DC? A. Half wave rectifier B. Full wave rectifier C. Bridge wave rectifier D. All of these 

Description : SCR can act as _______ controlled rectifier. A. phase B. frequency C. amplitude D. power  

Answer : SCR can act as phase controlled rectifier.

Description :  The silicon -controlled rectifier can be turned off : -  a) by a negative gate pulse b) by forced commutation c) with the off switch d) when the breakover voltage is exceeded

Answer :  The silicon -controlled rectifier can be turned off : - by forced commutation

Description : A UPS commonly has following parts : (i) rectifier (ii) inverter (iii) static switch Which of the following is true ?   (a) only (i) (b) only (i) and (ii) (c) (i), (ii) and (iii) (d) only (ii) and (iii) 

Description : We wish to build a 135 V, 20 A, DC power supply using a single phase bridge rectifier and an inductive filter. The peak to peak current ripple should be about 10%. If a 60 Hz AC source is available; Calculate the peak to peak current ripple.  (A) 19 A (B) 20 A (C) 2 A (D) 1 A 

Description :

Answer : Bridge rectifier requires four diodes 

Description : What will be the efficiency when the transformer operates at unity power factor and 60% of full load 

Answer : What will be the efficiency when the transformer operates at unity power factor and 60% of full load 96.5%

Description :

Answer : IEC stands for International Electrotechnical Commission.

Description : what is the full form of ISO ?

Answer : ISO stands for International Orgazisation for Standardization.

← Prev Question Next Question →
editAsk a Question
...