Coulomb’s law/ image charge
A small electrically charged ball is positioned at a certain distance in front of a metal plate lying at earth potential. The surface charge on the plate due to electrostatic induction together with the charged ball forms an electric field analogous to that which exists between two oppositely charged point charges. The electrostatic force acting on the ball can be measured with a sensitive torsion dynamometer.
- Experimental visualisation of a fundamental principle of electrodynamics
- Supplies non-hazardous high voltage
- Very sensitive measurement of the acting force
Measuring tape, l = 2 m
Electrometer Amplifier
PHYWE High voltage power supply, 25 kV
Capacitor 100 nF/250V, G1
Support base DEMO
Support rod, stainless steel, 1000 mm
Torsion dynamometer, 0.01 N
Conductor spheres, w. suspension
Insulating stem
Short-circuit plug, white
On/off switch
Plate capacitor, 283×283 mm
Conductor ball, d 40mm
Holder for U-magnet
Digital multimeter 2005
Connecting cord, 32 A, 250 mm, black
Connecting cord, 32 A, 250mm, green-yellow
Connecting cord, 32 A, 500 mm, red
Connecting cord, 32 A, 500 mm, blue
Connecting cord, 32 A, 1000 mm, black
Connecting cord, 32 A, 1000 mm, green-yellow
Connecting cord, 30 kV, 1000 mm
Right angle clamp expert
Barrel base expert
- Electric field
- Electric field strength
- Electric flux
- Electrostatic induction
- Electric constant
- Surface charge density
- Dielectric displacement
- Electrostatic potential