PN Junction Characteristics Experimental Apparatus for Electromagnetism Physics Lab

This PN Junction Characteristics Experimental Apparatus for Electromagnetism Physics Lab is designed for studying the electrical and thermal behavior of semiconductor PN junctions and for determining fundamental physical constants through experimental measurements. The system integrates precision temperature control, platinum resistance temperature sensing, adjustable DC power supplies, and high-resolution voltage measurement instruments to provide accurate and reliable experimental results. Students can investigate the relationship between junction voltage, diffusion current, and temperature while exploring semiconductor physics, weak-current measurement techniques, and the determination of the Boltzmann constant.

Physics Lab Experiments from Atico Exports.

Experimental Principle and Content

• Measure PN Junction Diffusion Current as a Function of Junction Voltage
• Determine the Boltzmann Constant Through PN Junction Measurements
• Construct and Study a Current-to-Voltage Converter Using Operational Amplifiers
• Measure Weak Electrical Currents Using Amplifier Circuits
• Investigate the Relationship Between PN Junction Voltage and Temperature
• Determine the Temperature Sensitivity of PN Junction Voltage
• Estimate the Energy Bandgap of Silicon at Absolute Zero
• Measure Temperature Using a Platinum Resistance Sensor
• Measure Electrical Resistance Using the DC Bridge Method

Educational Objectives

• Understand the Operating Principles of PN Junctions
• Study Semiconductor Electrical and Thermal Characteristics
• Learn Methods for Determining Fundamental Physical Constants
• Investigate Weak-Current Measurement Techniques
• Explore Temperature-Dependent Semiconductor Behavior
• Develop Practical Skills in Electronics, Instrumentation, and Data Analysis

DC Power Supplies :

• Two Adjustable Outputs
• Output Range 1: 0–15 V DC
• Output Range 2: 0–1.5 V DC

Digital Voltmeter 1 :

• 3½-Digit Digital Display
• Measuring Range: 0–2 V

Digital Voltmeter 2 :

• 4½-Digit Digital Display
• Measuring Range: 0–20 V

Temperature Controller :

• Temperature Range: Ambient Temperature to 80°C
• Resolution: 0.1°C

Temperature Sensor :

• Platinum Resistance Thermometric Bridge
• Resistance at 0°C (R₀): 100.00 Ω

Standard Supply

• Main Units × 2
• TIP31 Transistor × 1
• Thermostat × 1
• Transistor × 1
• Operational Amplifiers × 2
• Jumper Wires × 25
• Signal Cable × 1
• Instruction Manual × 1

• Investigates PN Junction Characteristics
• Facilitates Boltzmann Constant Determination
• Practical Applications in Electronics and Semiconductor Physics
• Comprehensive Experimental Capabilities