3.4 PRE-LABORATORY QUESTIONS1. What is a rectifier?2. How does a diode act as a rectifier?3. What is the significance of PIV? What is the condition imposed on PIV?4. What is meant by regulation?5. What is meant by time constant?6. What is meant by ripple factor? 3.7 CIRCUIT DIAGRAMS230V50 H₂ACTVo230V50 H₂AC3.8 EXPECTED GRAPHS12V12VnuIN 4007V₁ (RMS)DIDIOVFigure 3.1: Half-Wave Rectifier without FilterIN 4007Vi (RMS)заlac (0-200mAlacR₁(0-200)m.AR₁+ CIFigure 3.3(0-20)VFigure 3.2: Half-Wave Rectifier with Filter100 pF-INPUT SIGNALt3 / 4(0-20)V(0-20)VHALF WAVE RECTIFIER WITHOUT FILTERHALF WAVE RECTIFIER WITH FILTER(0-20)V***** OUTPUT OF RECTIFIER WITHOUT FILTEROUTPUT OF RECTIFIER WITH FILTER53%+3.9 TABLESTable 3.1: Half-Wave Rectifier without Filter1.2.3.1.2.LoadResistance(RL)500 Ω1 ΚΩ3.Table 3.2: Half-Wave Rectifier with FilterLoadResistance(RL)..10 ΚΩ...500 £21 KQInputOutputVoltage VoltagePeak (Vm) Peak (Vo)10 ΚΩInputVoltagePeak (Vm)Average DC Average DCCurrent Voltage(Idc)(Vdc)OutputVoltagePeak (Vo)Average DCCurrent(Idc)Average DCVoltage(Vdc)RMSVoltage(Vac)RMSVoltage(Vac)3.10 REPORTExperiment reports must include, but not limited to the followingDraw the o/p waveform without filterDraw the o/p waveform with filterFor a good filter should the ripple factor be high or low?What happens if the capacitor value is increased?Observe and plot the input and the output waveforms of a half-wave rectifier with andwithout filter.Ripple FactorVacVacy =Ripple FactorVacVacY = 3.1 AIMEXPERIMENT 3HALFWAVE RECTIFIERS WITH/WITHOUT FILTERSExamine the input and output waveforms of a half wave rectifier with and without filters.Calculate the ripple factor with load resistances of 500 2, 1 KQ, and 10 KQ, respectively. Calculateripple factor with a filter capacitor of 100 μF and the loads of 1 KQ, 2 KQ, and 10 K, respectively.3.2 COMPONENTS & EQUIPMENT REQUIRED12DEVICESa) AC Supplyb) Silicon Diodesc) Capacitora) DC Voltmeterb) AC VoltmeterDC Ammeter34 Cathode Ray Oscilloscope5 Decade Resistance Box6 Connecting wiresRANGE/RATING9-0-9 V1N40070.47 uF0-20 V0-20 V0-50 mA0-20 MHz10 Ω-100 ΚΩ5AQUANTITY (in No.s)11111111123.3 THEORYDuring positive half-cyde of the input voltage, the diode D1 is in forward bias and conductsthrough the load resistor R1. Hence the current produces an output voltage across the load resistorR1, which has the same shape as the +ve half-cycle of the input voltage.Q SearchDuring the negative half-cycle of the input voltage, the diode is reverse biased and there isno current through the circuit. L.e, the voltage across R1 is zero. The net result is that only the +vehalf-cycle of the input voltage appears across the load. The average value of the half-wave rectifiedo/p voltage is the value measured on DC voltmeter.For practical circuits, transformer coupling is usually provided for two reasons.1. The voltage can be stepped up or stepped down as needed.2. The AC source is electrically isolated from the rectifier. Thus, preventing shock hazardsin the secondary circuit.3.4 PRE-LABORATORY QUESTIONS1. What is a rectifier?2. How does a diode act as a rectifier?3. What is the significance of PIV? What is the condition imposed on PIV?4. What is meant by regulation?5. What is meant by time constant?6. What is meant by ripple factor?3.5 PRECAUTIONS1. Ensure that the polarities of the power supply and the meters as per the circuit diagram.2. Keep the input voltage knob of the regulated power supply in minimum position both whenswitching ON or switching OFF the power supply.3. No loose contacts at the junctions.4. Ensure that the ratings of the meters are as per the circuit design for precision.3.6 PROCEDUREHalf-Wave Rectifier without Filter1. Connect the circuit as shown in Figure 3.12. Adjust the load resistance, RL to 500 2, and note down the readings of input and outputvoltages through oscilloscope.3. Note the readings of DC current, DC voltage and AC voltage.4. Change the load resistance RL to 1 KQ and repeat the above procedure.5. Change the load resistance RL to 10 K2 and repeat the above procedure.6. Note down the values in Table 3.1Half-Wave Rectifier with Filter1. Connect the circuit as shown in Figure 3.2.2. Repeat the procedure shown above.3. Note down the values in Table 3.2.DELLWR

Question

Accepted Answer

Answered: Image /qna-images/answer/4f16790f-bfb4-4c8f-a4a1-16fa05bffbf2.jpg

What is a rectifier? 2. How does a diode act as a rectifier? 3. What is the significance of PIV? What is the condition imposed on PIV? 4. What is meant by regulation? 5. What is meant by time constant? 6. What is meant by ripple factor?