Field lines and equipotential lines

Item Code: SK044

Principle and Working:

An equipotential line is a collection of points in space when each point has the same value of electric potential. In the present setup, a voltage is applied between a pair of electrodes placed in a plastic trough filled with distilled water and voltage is measured at different points with a needle connected to a multimeter. The points are marked on another graph paper with reference to the graph placed under the trough.




  • 2-12V, 5A, AC/DC power supply with Thermal safety switch and safety sockets.
  • Point needle for tracing the field lines through conductive material.
  • Different shape of electrodes (bar, disc and ring) to produce different shape of field lines.
  • User friendly design and connections.

  • To investigate the equipotential lines of electric fields.
  • To draw the equipotential lines for bar electrode.
  • To draw the equipotential lines for disc electrode.
  • To draw the equipotential lines for ring electrode.
  • Power Supply : 2-12V AC/DC, 220V, ± 5%, 50Hz AC, Voltage 2,3,4,5,6,8,10 & 12 V AC full wave rectified, unsmoothed & unregulated D.C.
  • Electrode Sets : Bar Electrode 100x15x15mm (L x W x H), Disc Electrode 40x15mm (Фxt), Ring Electrode 34x40mm (I.D x O.D)
  • Trough : Acrylic, 390x300x50 mm approx. (LxWxH)
  • 1 Trough
  • 1 Needle
  • 1 Rod with socket
  • 1 Digital multimeter
  • 1 Cylindrical base
  • 2 Bar electrode
  • 2 Disc electrode
  • 1 Ring electrode
  • 1 Stand rod
  • 1 Boss head
  • 1 Power supply (2-12 V AC)
  • 2 Flexible plug lead red
  • 2 Flexible plug lead black
  • Equipotential lines
  • Electric field lines
  • Surface potential
  • Voltage
  • AC potential
  • DC potential
  • Electric flux