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Basic Electronics Lab Exercise
Lab Exercise # 01/02:
Date:
Current Voltage Relation of Diode
Roll No.:
1. Calculate the forward voltage and current through diode at different supply voltage.
Forward Bias
Supply Voltage
VS
Forward Voltage
VF
Forward Current
IF
Reverse Bias
Reverse Voltage
VR
Reverse Current
IR
0.25
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
2. Obtain the characteristics graph based on measured data in 1, specify the type of diode
and forward voltage.
3. Advantage of Silicon over Germanium diodes.
16 Mechanical (Section A & B)
Basic Electronics Lab Exercise
Lab Exercise # 03:
Half Wave Rectification
Date:
Roll No.:
1. Measure secondary voltage Vs (RMS), DC Voltage, RMS output voltage and fill table
according to data.
Input
Voltage
Turn
Ratio
Ns/Np
120, 60Hz
12:1
220, 50Hz
20:2
Secondary
Volt.
Vp(out)
Voltage DC
(Average)
Voltage
RMS
2. Show the input/output waveform of Halfwave Rectification obtained in class and also
calculate RMS, DC voltage for rectified signal.
Voltage DC (Average) =
Voltage RMS =
3. Enlist three application of Rectifier.
16 Mechanical (Section A & B)
Basic Electronics Lab Exercise
Lab Exercise # 04:
Full Wave Bridge Rectification
Date:
Roll No.:
1. Measure secondary voltage Vs (RMS), DC Voltage, RMS output voltage and fill table
according to data.
Input
Voltage
Turn
Ratio
Ns/Np
120, 60Hz
12:1
220, 50Hz
20:2
Secondary
Volt.
Vp(out)
Voltage DC
(Average)
Voltage
RMS
2. Show the input/output waveform of Halfwave Rectification obtained in class and also
calculate RMS, DC voltage for rectified signal.
Voltage DC (Average) =
Voltage RMS =
3. What happen if we directly connect the diode with 220V AC source if it has 24v PIV?
16 Mechanical (Section A & B)
Basic Electronics Lab Exercise
Lab Exercise # 05:
C-Tap Full Wave Rectification
Date:
Roll No.:
1. Measure secondary voltage Vs (RMS), DC Voltage, RMS output voltage and fill table
according to data.
Input
Voltage
Turn
Ratio
Ns/Np
Secondary
Volt.
V1
Vp(out)
Voltage DC
(Average)
Ripple
V2
120v, 60Hz
220v, 50Hz
2. Show the input/output waveform of Halfwave Rectification obtained in class and also
calculate RMS, DC voltage for rectified signal.
Voltage DC (Average) =
Voltage RMS =
3. Difference between Full Wave Bridge and Centre-Tap Rectifier. Consider if Vp (Maximum
Secondary terminal Voltage) is 24V the calculate the output DC voltage of FWB and CTR.
16 Mechanical (Section A & B)
Basic Electronics Lab Exercise
Lab Exercise # 06:
Date:
Characteristics of Zener Diode and Voltage Regulation
Roll No.:
1. Calculate the forward voltage and current through Zener diode at different supply voltage.
Forward Bias
Supply Voltage
VS
Forward Voltage
VF
Forward Current
IF
Reverse Bias
Reverse Voltage
VR
0.5
1.5
3
4.5
6
2. What happen if Zener diode connect in forward bias?
3. Difference between Zener and avalanche breakdown?
16 Mechanical (Section A & B)
Reverse Current
IR
Basic Electronics Lab Exercise
Lab Exercise # 07:
Design of DC Power Source
Date:
Roll No.:
1. Measure the following data:
a. Input voltage,
Vin (ac):
b. Step down voltage,
Vs (ac):
c. Voltage capacitor,
Vc (dc):
d. Ripple voltage,
Vp (ac):
e. Output voltage,
Vo (dc):
f. Output Current,
Io (dc):
2. What is frequency and time period of DC voltage?
3. Name the reactive/energy storage elements and why they are important in AC to DC
conversion.
16 Mechanical (Section A & B)
Basic Electronics Lab Exercise
Lab Exercise # 08:
Date:
Wave Shaping Using Diode
Roll No.:
1. Submit a picture of your circuit and output waveform.
2. How a double diode clipper can be used to design a square wave.
3. Define series and parallel clippers?
16 Mechanical (Section A & B)
Basic Electronics Lab Exercise
Lab Exercise # 09/10:
Date:
Transistor Characteristics & Switching
Roll No.:
1. Identitfy the terminals and type of transistor using data sheet.
a. BD244A
b. FJN13003
2. Find out the Maximum VCE (sat), VBE and IC from above models.
3. How many regions of operation does BJT have
4. Draw schematic symbol for PNP and NPN transistor.
5. List the commonly used biasing method of transistors.
16 Mechanical (Section A & B)
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