Electrostatic – Coulomb’s Law Apparatus – MAS 5432

Coulomb’s Law

Study the force between two electric charges is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.

Mathematical Representation

F: electrostatic force

k: Coulomb’s constant

Q1, Q2: charges of the two objects

r: distance between the charges

Potential Investigations

  • Quantitative analysis of force-distance relationship.
  • Determination of Coulomb’s constant through experimental data.
  • Investigation of the effect of charge magnitude on electrostatic force.
  • Study of the impact of different dielectric materials on force.
  • Exploration of the role of humidity and temperature on experimental results.

Additional Power Supply E.H.T Required – MAS 5103


A floating, high voltage power source useful for supplying a charge for quantitative electrostatic experiments, gas discharge tubes/spectrum tubes. Continuously variable output up to 6 KV DC. 6V/2A AC or 12V/2A AC filament heating supply, insulated for EHT Voltages. Current limited output: 0-6 KV DC, 50μA with 50MΩ resistor is also provided in this power supply. A rotary control knob is provided on the front panel to adjust the EHT output. The non-hazardous maximum load capacity of 3mA (short circuit current). A digital/analog meter is provided on the front panel to set the required voltage. All outputs via clearly marked 4mm shielded sockets. Both input and output fuse is protected. Plastic Box with Indicator type ON/OFF switch. Supplied complete with detachable mains lead.