# KSCICLA Klinger Scientific Coulomb's Law Apparatus

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# Klinger Scientific Coulomb's Law Apparatus

Coulomb's Law states that the force between two electrical charges is proportional to the product of the charges and inversely proportional to the square of the distance between them. Students can measure charge force & distance between two conductive spheres in which one sphere is mounted on the end of an insulating, counterbalanced rod & suspended from a thin torsion wire while the second is positioned at different positions. When the conductive spheres are charged, the force between them is proportional to the twist of the torsion wire that is required to bring the balance back to its equilibrium position. Beginning students can determine the Inverse Square Law in a simple experiment. Advanced students can perform a more sophisticated investigation into all the variables of electrostatic repulsion.

Coulomb’s Law Apparatus, students can accurately measure charge, force and distance between two conductive spheres. Its symmetrical design minimizes stray and mirror charges and built-in magnetic damping ensures quick, accurate measurements.

· Built-in Balance Scale: A degree scale on the torsion balance provides accurate measurements of the torsion wire’s twist angle.

· Magnetic Damping: Allows measurements to be made quickly, minimizing the traditional difficulties with leakage currents.

· Milligram Masses: Included so determining

the torsion constant and verifying its linearity can be part of the experiment.

· Built-in Track Scale: A millimeter scale on the linear track provides accurate measurements of the distance between the spheres.

· Symmetric Construction: All conductive parts are symmetrical, so errors due to mirror charges are practically nonexistent.

Technical Specifications

· Torsion Balance Assembly -38 mm dia. conductive sphere on 12 cm rod with counterbalance vane.

· Torsion Balance Degree Plate-1° increments

· Torsion Balance Magnetic Damping- dampens oscillations for quick measurements

· Linear Track Sphere-38 mm dia. conductive sphere

· Calibration Masses-50 mg (1), 20 mg (2)

· Conductive Sphere on Insulating Thread- for reducing charge by fixed ratios

· Spare Torsion Wire-1 m

· EHT Power Supply-6KV

· Charging Probe-17 cm long plus 1.5 m cable; banana plug connector

What's Included

· 1x Coulomb's Law Apparatus

· 1x Charging Probe

· 1xCalibration Masses

· 1x Calibration Post

. 1x EHT 6kV Power Supply

· 1x Manual

What is needed:

KSCICLA - Klinger Scientific Coulomb's Law Apparatus

KSCIPSEHT - Klinger Scientific Power Supply E.H.T