Construction of an Ammeter and a Voltmeter for Electromagnetism Physics Lab

This Construction of an Ammeter and a Voltmeter for Electromagnetism Physics Lab is designed for studying the principles of electrical measurement, galvanometer operation, instrument range extension, and meter calibration techniques. The apparatus enables students to investigate the characteristics of a microampere galvanometer and convert it into practical DC ammeters and voltmeters through the use of shunt and multiplier resistors. It also provides facilities for instrument calibration and accuracy evaluation using standard digital measuring instruments. The system serves as an excellent educational platform for understanding electrical instrumentation, measurement technology, and analog meter design.

Physics Lab Experiments from Atico Exports.

Experimental Principle and Content

• Study the Structure and Operating Principle of a Microampere Galvanometer
• Determine the Characteristics of a Galvanometer Movement
• Convert a Galvanometer into a DC Ammeter
• Convert a Galvanometer into a DC Voltmeter
• Extend the Measurement Range of Electrical Meters
• Study the Principles of Multimeter Construction
• Calibrate Electrical Measuring Instruments Using Standard References
• Determine the Accuracy Grade of Constructed Meters
• Compare Analog and Digital Measurement Techniques

Educational Objectives

• Understand the Principles of Current and Voltage Measurement
• Learn the Operation and Characteristics of Galvanometers
• Study Range Extension Techniques for Electrical Instruments
• Develop Skills in Instrument Calibration and Verification
• Analyze Measurement Accuracy and Instrument Performance
• Gain Practical Experience in Electrical Measurement Systems

DC Power Supply :

• Output Voltages: 1.5 V and 5 V

DC Microampere Galvanometer :

• Measuring Range: 0–100 μA
• Internal Resistance: Approximately 1.7 kΩ
• Accuracy Class: 1.5

Digital Voltmeter :

• Measuring Range: 0–1.999 V
• Resolution: 0.001 V

Digital Ammeter (Range 1) :

• Measuring Range: 0–1.999 mA
• Resolution: 0.001 mA

Digital Ammeter (Range 2) :

• Measuring Range: 0–199.9 μA
• Resolution: 0.1 μA

Resistance Box :

• Resistance Range: 0–99999.9 Ω
• Resolution: 0.1 Ω

Multi-Turn Potentiometer :

• Resistance Range: 0–33 kΩ
• Continuously Adjustable

Standard Supply

• Experimental Main Unit × 1
• DC Microampere Galvanometer × 1
• Digital Voltmeter × 1
• Digital Ammeter × 1
• Resistance Box × 1
• Multi-Turn Potentiometer × 1
• Connection Leads × 1 Set
• Instruction Manual × 1

• Comprehensive Experimental Content
• Clear Demonstration of Electrical Measurement Principles
• Stable and Reliable Experimental Performance
• Practical and Well-Organized Configuration